French translation and validation of 3 functional disability scales for neck pain

Evaluating cervical spine mobility and Fitt's law compliance: The DidRen laser test adapted for virtual reality with age and sex effects

Cervical spine mobility assessment is crucial in rehabilitation to monitor patient progress. This study introduces the DidRen VR test, a virtual reality (VR) adaptation of the conventional DidRen laser test, aimed at evaluating cervical spine mobility. We conducted a cross-sectional study involving fifty healthy participants that underwent the DidRen VR test. The satisfaction of Fitts' law within this VR adaptation was examined and we analyzed the effects of age and sex on the sensorimotor performance metrics. Our findings confirm that Fitts' law is satisfied, demonstrating a predictable relationship between movement time and the index of difficulty, which suggest that the DidRen VR test can simulate real-world conditions. A clear influence of age and sex on performance was observed, highlighting significant differences in movement efficiency and accuracy across demographics, which may necessitate personalized assessment strategies in clinical rehabilitation practices. The DidRen VR test presents an effective tool for assessing cervical spine mobility, validated by Fitts' law. It offers a viable alternative to real-world method, providing precise control over test conditions and enhanced engagement for participants. Since age and sex significantly affect sensorimotor performance, personalized assessments are essential. Further research is recommended to explore the applicability of the DidRen VR test in clinical settings and among patients with neck pain.

Moving from the clinic to telehealth during the COVID-19 pandemic - a pilot clinical trial comparing in-clinic rehabilitation versus telerehabilitation for persisting symptoms following a mild Traumatic brain injury

PURPOSE

The objective of this study was to compare the effects of an in-clinic cervicovestibular rehabilitation program (education, home exercises, manual techniques, sub-symptom threshold aerobic exercise [STAE] program) to a similar program (education, home-exercises, STAE program), but without manual techniques, provided in a telerehabilitation format in adults with persisting post-concussion symptoms (PCS).

MATERIALS AND METHODS DESIGN

In this parallel-group non-randomized clinical trial, 41 adults with persisting PCS were allocated to the in-clinic (n = 30) or telerehabilitation (n = 11) program. The outcome measures, which included the Post-Concussion Symptom Scale (PCSS; primary outcome), Numerical Pain Rating Scale (NPRS) for neck pain and headache and three disability questionnaires, were collected at baseline, weeks 6, 12, and 26. Non-parametric analysis for longitudinal data (NparLD) was used.

RESULTS

For the PCSS, there was a group-by-time interaction (p = 0.05) with significant between-group differences at week 6, 12, and 26 (p < 0.05) for the in-clinic group. There were also group-by-time interactions for NPRS neck pain and headache (p < 0.05) for the in-clinic group.

CONCLUSION

The study suggests that a telehealth format failed to reach the efficiency of an in-clinic rehabilitation program in terms of symptoms reduction and functional improvement. These results must be interpreted with caution given the limited number of participants. ClinicalTrials.gov Identifier: NCT03677661.IMPLICATION FOR REHABILITATIONThe telerehabilitation format for adults with persisting post-concussion symptoms was widely implemented in the COVID-19 pandemic without any evidence of efficacy over the more traditional in-clinic rehabilitation format.The study suggests that a telerehabilitation format failed to reach the efficiency of an in-clinic rehabilitation program in terms of symptoms reduction and functional improvement.Clinicians should try to incorporate some in-clinic appointments when a telerehabilitation format is required such as for patients in underserved area.

Translation and validation of the Urdu version of the neck pain and disability scale

PURPOSE

To translate and cross-culturally adapt the neck pain and disability scale (NPDS) into Urdu language (NPDS-U), and to investigate the NPDS-U's psychometric properties in patients with non-specific neck pain (NSNP).

METHODS

The NPDS was translated and cross-culturally adapted into Urdu in accordance with the previously described guidelines. The study included 200 NSNP patients and 50 healthy participants. The NPDS-U, Urdu version of neck disability index (NDI-U), neck Bournemouth questionnaire (NBQ), and numerical pain rating scale (NPRS) were completed by all participants. After three weeks of physiotherapy, the patients completed all of the above-mentioned questionnaires, along with the global rating of change scale. Reliability, factor analysis, validity, and responsiveness were all tested.

RESULTS

The NPDS-U demonstrated excellent test-retest reliability (ICC2,1=0.92) and high internal consistency (Cronbach's alpha = 0.96). There were no floor or ceiling effects. A three-factor structure was extracted, which explained 70.42% of the total variance. The NPDS-U showed moderate to strong correlations with NPRS, NDI-U, and NBQ (r = 0.67-0.76, p < 0.001). A significant difference in the NPDS-U change scores between the stable and the improved groups (p < 0.001) confirmed its responsiveness.

CONCLUSION

The NPDS-U is a reliable, valid, and responsive scale for assessing neck pain and disability in Urdu-speaking patients with NSNP.

The Hausa Northwick Park Neck Pain Questionnaire: translation, cross-cultural adaptation and psychometric assessment in patients with non-specific neck pain

PURPOSE

To translate and cross-culturally adapt the Northwick Park Neck Pain Questionnaire (NPQ) into Hausa and assess its psychometric properties.

MATERIALS AND METHODS

The NPQ was translated and cross-culturally adapted into Hausa using recommended guidelines. A consecutive sample of 92 Hausa-speaking patients with non-specific neck pain recruited from three tertiary hospitals in north-western Nigeria, completed the questionnaire to assess factorial validity (using confirmatory factor analysis), convergent validity (by correlating the Hausa-NPQ with the Numerical Pain Rating Scale [NPRS]), and internal consistency (using Cronbach's α). A subsample of 50 patients completed the questionnaire again 3 days after the first administration to assess relative reliability using intraclass correlation coefficients (ICC) and absolute reliability using standard error of measurement (SEM), smallest detectable change (SDC), and 95% limits of agreement (LOA).

RESULTS

The factor analysis confirmed a single-factor structure with excellent internal consistency (α = 0.94). The questionnaire showed a strong positive correlation with the NPRS (rho = 0.68). The ICC was 0.86, with SEM and SDC of 6.32 and 17.5, respectively. The LOA was - 29.3 to + 37.1 with no evidence of proportional bias.

CONCLUSIONS

The Hausa-NPQ is a valid and reliable measure of disability due to neck pain.

Randomized controlled trial comparing technical features and clinical efficacy of a multi-tined cannula versus a conventional cannula for cervical medial branch radiofrequency neurotomy in chronic neck pain

Objectives

Compare procedural characteristics and clinical efficacy of cervical medial branch radiofrequency neurotomy (CMBRFN) using a multi-tined cannula (MTC) versus a conventional cannula (CC) to treat chronic neck pain.

Design

Prospective, double-blinded randomized controlled trial.

Methods

Patients who responded to dual medial branch blocks with ≥75% pain relief were randomized to receive RFN with either the MTC or the CC. Primary outcomes: procedural pain, procedure duration, fluoroscopy time and radiation dose. Secondary outcomes: proportion of patients reporting ≥50% numerical rating scale reduction and ≥30% neck disability index reduction at 3, 6 and 12 months.

Results

Forty-two patients underwent treatment. There was no difference in procedural pain between the MTC and CC groups (NRS 4.7 ± 2.0 vs. 4.2 ± 1.8, p = 0.465), but three patients, all in the CC group, could not complete the procedure due to pain. CMBRFN in the MTC group was significantly faster than in the CC group (35.5 ± 7.3 min vs. 58.2 ± 14.8 min, p < 0.001), with less fluoroscopy time (167.6 ± 76.4 s vs. 260.8 ± 123.5 s, p = 0.004). Radiation dose was 8.95 ± 7.9 mGy in the MTC group and 11.53 ± 10.3 mGy in the CC group (p = 0.36). Rates of ≥50% NRS reduction were not significantly different between the two groups at 3 months, but at 6 and 12 months, they were significantly higher in the CC group. At 3, 6 and 12 months, rates of ≥30% NDI reduction were significantly higher in the CC group.

Conclusions

The MTC offers technical advantages compared to the CC for both the operator and the patient. However, CMBRFN with the multi-tined cannula seems less effective to treat neck pain than with the conventional cannula.

Cross-cultural adaptation and validation of the Northwick park neck pain questionnaire to Urdu language

BACKGROUND

Despite its widespread use for assessing pain and disability in patients suffering from neck pain, the Northwick Park Neck Pain Questionnaire (NPQ) has yet to be translated and validated in Urdu. The purpose of the present study was to translate and cross-culturally adapt the NPQ into Urdu language (NPQ-U), and to investigate the NPQ-U's psychometric properties in patients with non-specific neck pain (NSNP).

METHODS

The NPQ was translated and cross-culturally adapted into Urdu in accordance with the previously described guidelines. The study included 150 NSNP patients and 50 healthy participants. The NPQ-U, Urdu version of neck disability index (NDI-U), neck pain and disability scale (NPDS), and numerical pain rating scale (NPRS) were completed by all participants on first visit. After three weeks of physical therapy, the patients completed all of the questionnaires listed above, along with the global rating of change scale. Test-retest reliability was determined on 46 randomly selected patients who completed the NPQ-U again two days after the first response. The NPQ-U was evaluated for internal consistency, content validity, construct (convergent and discriminative) validity, factor analysis, and responsiveness.

RESULTS

The NPQ-U demonstrated excellent test-retest reliability (intra-class correlation coefficient = 0.96) and high internal consistency (Cronbach's alpha = 0.89). There were no floor or ceiling effects for the NPQ-U total score, indicating good content validity. A single factor was extracted, which explained 54.56% of the total variance. For convergent validity, the NPQ-U showed a strong correlation with NDI-U (r = 0.89, P < 0.001), NPDS (r = 0.71, P < 0.001), and NPRS (r = 0.73, P < 0.001). The results revealed a significant difference between patients and healthy controls in the NPQ-U total scores (P < 0.001) demonstrating significant discriminative validity. A significant difference in the NPQ-U change scores between the stable and the improved groups (P < 0.001) confirmed its responsiveness. Furthermore, the NPQ-U change score showed a moderate correlation with NPDS change score (r = 0.60, P < 0.001) and NPRS change score (r = 0.68, P < 0.001), but a strong correlation with NDI-U change score (r = 0.75, P < 0.001).

CONCLUSION

The NPQ-U is a reliable, valid, and responsive tool for assessing neck pain and disability in Urdu-speaking patients with NSNP.

Observational, Multicenter Study of the Efficacy and Safety of Cervical Disk Arthroplasty With Mobi-C in the Treatment of Cervical Degenerative Disk Disease. Results at 10 years Follow-Up

BACKGROUND

Cervical disk arthroplasty replacement (CDA) was developed to avoid specific disadvantages of cervical fusion. The purpose of this paper is to provide 10-year follow-up results of an ongoing prospective study after CDA.

METHODS

Three hundred eighty-four patients treated using the Mobi-C (ZimVie, Troyes, France) were included in a prospective multicenter study. Routine clinical and radiologic examinations were reported preoperatively and postoperatively with up to 10-year follow-up. Complications and revision surgeries were also documented.

RESULTS

At 10 years showed significant improvement in all clinical outcomes [Neck Disability Index, visual analog scale (VAS) for arm and neck pain, physical component summary of SF36, and mental component summary of SF36). Motion at the index level increased significantly over baseline (mean range of motion=7.6 vs. 8 degrees at five years and 6.0 degrees preoperatively; P <0.001) and 71.3% of the implanted segments remained mobile (range of motion>3 degrees). Adjacent disks were also mobile at 10 years with the same mobility as preoperatively. At 10 years, 20.9% of the implanted segments demonstrated no heterotopic ossification. Thirty-four patients (8.9%) experienced 41 adverse events, with or without reoperation during the first five years. We found only two additional surgeries after five years. We observed an increased percentage of working patients and a decrease in medication consumption. Regarding the overall outcome, 94% of patients were satisfied.

CONCLUSIONS

Our 10-year results showed significant improvement in all clinical outcomes, with low rates of revision or failure. This experience in patients with long-term follow-up after CDA endorses durable, favorable outcomes in properly selected patients.

Validation of the Total Disability Index (TDI) in French Version

INTRODUCTION

The Total Disability Index (TDI) questionnaire has been developed to provide a more complete assessment of low back and neck pain, as they frequently co-occur. This study aimed at validating the TDI questionnaire in French, to determine if it could be used in France.

HYPOTHESIS

The TDI French version is valid, reproducible and comparable to the English version.

METHODS

This multicentric study prospectively included French-speaking volunteers, both patients admitted for spine surgery in two specialized spine centers and healthy individuals. Healthy subjects were recruited among students of an engineering school and medical staff. A booklet was given to the participants containing a Lumbar and Cervical Visual Analog Scale (respectively LVAS and CVAS), and the French versions of Oswestry Disability Index (ODI), Neck Disability Index (NDI) and TDI questionnaires. Statistical analysis included Cronbach's α calculation for internal consistency assessment, correlation analysis with ODI and NDI items for convergent validity, principal component analyses and factor analysis. Discriminant validity was assessed by comparing healthy subjects and patients using Student's t tests, and floor and ceiling effects search.

RESULTS

71 participants were included, with 34 (48%) healthy volunteers and 37 (52%) patients. Mean age was 45.2±19.6 years and 57% of the cohort were males. Internal consistency was good: Cronbach's α was calculated at 0.96 (95%CI: [0.95-0.98]). For each TDI item, a high correlation was found with ODI corresponding items, between 0.81 and 0.97 (p<0.001), and good correlation with NDI items, ranging from 0.65 to 0.96 (p<0.001). TDI correlated also with LVAS and CVAS (respectively 0.70 and 0.65, p<0.001). Principal component analyses indicated good correlation between the TDI items and between each item and TDI total score. Factor analysis indicated two main factors explaining 77% of TDI variance, constituted by all TDI items. Regarding discriminative validity, healthy subjects and patients presented significantly different TDI scores (p-values ≤0.01 for each item). Barplot representations of each TDI item revealed no major floor nor ceiling effects.

CONCLUSION

This study confirms the reliability, feasibility and validity of the Total Disability Index questionnaire in its French version. Its validation allows its use in France.

LEVEL OF EVIDENCE

II.

Fat Infiltration of Multifidus Muscle Is Correlated with Neck Disability in Patients with Non-Specific Chronic Neck Pain

Background: Chronic non-specific neck pain (CINP) is common, but the etiology remains unclear. This study aimed to examine the relationship between cervical muscle composition (cervical multifidus and longus capitis/longus colli), morphometry, range of movement, muscle function, and disability severity (Neck Disability Index) in patients with CINP. Methods: From September 2020 to July 2021, subjects underwent cervical MRI and clinical tests (cervical range of motion, cranio-cervical flexion test, neck flexor, and extensor muscle endurance). MRI analysis comprised muscle cross-sectional area, volume, and fat infiltration of multifidus and longus colli between C4 and C7 levels. Results: Twenty-five participants were included. Multiple linear regression analysis indicated that NDI was positively correlated with the volume percentage of fat infiltration of the multifidus (B = 0.496), negatively correlated with fat-free muscle volume of the multifidus normalized by subject height (B = −0.230), and accounted for 32% of the variance. There was no relationship between neck disability and longus capitis/longus colli morphology. We also found no relationship between neck disability scores, neck flexor or extensor muscle endurance, or the outcome motor control test of craniocervical flexion (p > 0.05). Conclusions: Neck disability was moderately correlated with the percentage of fat volume in the multifidus muscle and fat-free volume of the multifidus. There was no relationship between NDI scores and muscle function test outcomes or any fat or volume measures pertaining to the longus colli muscle.

Characteristics, expectations, experiences of care, and satisfaction of patients receiving chiropractic care in a French University Hospital in Toulouse (France) over one year: a case study

BACKGROUND

In October 2017, a partnership was established between the University Hospital of Toulouse and the French Chiropractic College, "Institut Franco-Européen de Chiropraxie" (IFEC). Before 2017, chiropractors did not practice in hospitals in France. Chiropractic students and chiropractors are now integrated in an interdisciplinary medical team at University Hospital. Our study aimed to describe the characteristics of patients who received chiropractic care at the University Hospital of Toulouse, their expectations, experiences of care, and satisfaction.

METHOD

A prospective case study was conducted. Patients referred for chiropractic care in the French University Hospital of Toulouse from January to December 2020 were eligible to participate. Participants provided the following data: demographics, previous chiropractic care treatments, pain location, intensity (NRS) and duration, disability (NDI, ODI), health-related quality of life (SF-12) and depressive symptomatology (PHQ-9). We conducted semi-structured interviews to explore their expectations, barriers and facilitators impacting their experience of care, and satisfaction.

RESULTS

Seventeen participants were recruited and seven were interviewed. All participants had chronic pain with a median pain intensity of 05/10 (IQR 04-06) on the NRS scale. Nine of 17 participants presented with multiple pain locations. Thirteen of seventeen participants presented with low back pain and eight with neck pain. The median SF-12 health-related quality of life score was 50/100 (IQR 28.5-60.5) for physical health, and 52/100 (IQR 43-62) for mental health. The PHQ-9 median score of depressive symptomatology was 7.7/27 (IQR 2.0-12.5). Overall, participants were satisfied with their care and the collaboration between chiropractors and physicians. Participants expected a caring communication with the chiropractic team. Their experience was facilitated by their trust in their physician. Patients perceived the turnover of chiropractic students as a barrier to their satisfaction.

CONCLUSION

Our participants presented with chronic musculoskeletal pain and depressive symptoms. Our study identified facilitators and barriers for patient expectation and satisfaction with chiropractic care in a hospital setting. This study provides the first data describing the collaboration between chiropractors and physicians in France in the management of musculoskeletal disorders. These findings will inform the quality improvement of our partnership, student's training and the development of future hospital-based collaborations integrating chiropractic care in a multidisciplinary team in France.

Psychometric properties of the Brazilian short-version of the Northwick Park Neck Pain Questionnaire

OBJECTIVE

To translate, cross-culturally adapt and assess measurement properties of the translated version of the Northwick Park Neck Pain Questionnaire into Brazilian Portuguese.

DESIGN

Cross-sectional study.

SETTINGS

University healthcare facility and online.

PARTICIPANTS

People with chronic neck pain (n = 178).

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Participants answered the translated version of Northwick Park Neck Pain Questionnaire, the Neck Disability Index, the Numerical Rating Scale for pain, the Tampa Scale for Kinesiophobia and the Pain Catastrophizing Scale. Seven to ten days after that, a subset of 84 participants answered the Northwick Park Neck Pain Questionnaire again. The structural (exploratory and confirmatory factor analyses) and construct validities, internal consistency, reliability and concordance were assessed. Level of significance was set at 5%.

RESULTS

Participants' (35.6 ± 13.5 years old) with symptoms duration of 54.4 ± 60.4 months scored 25.5 ± 14.0 on the Brazilian Northwick Park Neck Pain Questionnaire and 11.9 ± 5.8 on the Neck Disability Index. The structural analysis showed that the short version of the Northwick Park Neck Pain Questionnaire has an adequate structure to measure disability due to neck pain. Correlations with other questionnaires were between 0.268 and 0.678, Cronbach's alfa was 0.76, intraclass correlation coefficient was 0.96, standard error of measurement was 2.74 and minimal detectable change was 7.60.

CONCLUSION

The short version of the Northwick Park Neck Pain Questionnaire is valid and reliable to be used in patients with chronic neck pain, as it presented adequate measurement properties of structural and construct validity, reliability and concordance.

Cervicovestibular Rehabilitation in Adults with Mild Traumatic Brain Injury: A Randomised Clinical Trial

The objective of this study was to compare the effects of a cervicovestibular rehabilitation program combined with symptom-limited aerobic exercise (SLAE) program to a SLAE program alone in adults with persistent symptoms following mild traumatic brain injury (mTBI) on severity of symptoms and other indicators of clinical recovery. In this single-blind, parallel-group randomised clinical trial, 60 adults with persistent symptoms following mTBI were randomly assigned to: 1) a 6-week SLAE program or 2) a 6-week cervicovestibular rehabilitation program combined with SLAE program. All participants took part in 4 evaluation sessions (baseline, week 6, 12 and 26) performed by a blinded evaluator. The primary outcome was the Post-Concussion Symptoms Scale (PCSS). The secondary outcomes were Numerical Pain Rating Scale (NPRS), Neck Disability Index (NDI), Headache Disability Inventory (HDI), Dizziness Handicap Inventory (DHI), time to return to function, and physical cervical and vestibular measures. Nonparametric analysis for longitudinal data was used to evaluate the effect of interventions on outcomes. For PCSS, NPRS, NDI, HDI, DHI and return to function, there were no group-by-time interactions at any time-points follow-up (p>0.05); clinically significant time effects were however observed (p0.05). There were group-by-time interactions at weeks 6 and 12 for vestibulo-ocular reflex (p0.003) and the cranio-vertebral mobility (p0.001) measures in favor of the cervicovestibular rehabilitation group. The study indicates that a cervicovestibular rehabilitation program combined with SLAE was not superior to a SLAE program alone in term of symptoms and functional level improvement but resulted in improved physical cervical and vestibular function. Keywords: mild traumatic brain injury, rehabilitation, neck pain, dizziness, headache.

Sensorimotor performance in acute-subacute non-specific neck pain: a non-randomized prospective clinical trial with intervention

Background

The assessment of cervical spine kinematic axial rotation performance is of great importance in the context of the study of neck sensorimotor control. However, studies addressing the influence of the level of provocation of spinal pain and the potential benefit of passive manual therapy mobilizations in patients with acute-subacute non-specific neck pain are lacking.

Methods

A non-randomized prospective clinical trial with an intervention design was conducted. We investigated: (1) the test-retest reliability of kinematic variables during a fast axial head rotation task standardized with the DidRen laser test device in 42 Healthy pain-free Control Participants (HCP) (24.3 years ±6.8); (2) the differences in kinematic variables between HCP and 38 patients with Acute-subacute Non-Specific neck Pain (ANSP) assigned to two different groups according to whether their pain was localized in the upper or lower spine (46.2 years ±16.3); and (3) the effect of passive manual therapy mobilizations on kinematic variables of the neck during fast axial head rotation.

Results

(1) Intra-class correlation coefficients ranged from moderate (0.57 (0.06-0.80)) to excellent (0.96 (0.91-0.98)). (2) Kinematic performance during fast axial rotations of the head was significantly altered in ANSP compared to HCP (age-adjusted) for one variable: the time between peaks of acceleration and deceleration (p<0.019). No significant difference was observed between ANSP with upper vs lower spinal pain localization. (3) After the intervention, there was a significant effect on several kinematic variables, e.g., ANSP improved peak speed (p<0.007) and performance of the DidRen laser test (p<0.001), with effect sizes ranging from small to medium.

Conclusion

(1) The DidRen laser test is reliable. (2) A significant reduction in time between acceleration and deceleration peaks was observed in ANSP compared to HCP, but with no significant effect of spinal pain location on kinematic variables was found. (3) We found that neck pain decreased after passive manual therapy mobilizations with improvements of several kinematic variables.

Trial registration

Registration Number: NCT 04407637

Supplementary Information

The online version contains supplementary material available at 10.1186/s12891-021-04876-4.

Clinimetric Properties of Self-reported Disability Scales for Whiplash: A Systematic Review for the Whiplash Core Outcome Set (CATWAD)

OBJECTIVES

A core outcomes set (COS) for whiplash-associated disorders (WADs) has been proposed to improve consistency of outcome reporting in clinical trials. Patient-reported disability was one outcome of interest within this COS. The aim of this review was to identify the most suitable tools for measuring self-reported disability in WAD based on clinimetric performance.

METHODS

Database searches took place in 2 stages. The first identified outcome measures used to assess self-reported disability in WAD, and the second identified studies assessing the clinimetric properties of these outcome measures in WAD. Data on the study, population and outcome measure characteristics were extracted, along with clinimetric data. Quality and clinimetric performance were assessed in accordance with the Consensus-based Standards for the Selection of Health Status Measurement Instruments (COSMIN).

RESULTS

Of 19,663 records identified in stage 1 searches, 32 were retained following stage 2 searches and screening. Both the Whiplash Disability Questionnaire and Neck Disability Index performed well in reliability (intraclass correlation coefficient=0.84 to 0.98), construct validity (74% to 82% of hypotheses accepted), and responsiveness (majority of correlations in accordance with hypotheses). Both received Category B recommendations due to a lack of evidence for content validity.

DISCUSSION

This review identified the Neck Disability Index and Whiplash Disability Questionnaire as the most appropriate patient-reported outcome measures (PROMs) for assessing self-reported disability in WAD based on moderate to high-quality evidence for sufficient reliability, construct validity and responsiveness. However, the content validity of these PROMs has yet to be established in WAD, and until this is undertaken, it is not possible to recommend 1 PROM over the other for inclusion in the WAD COS.

Can Headache Profile Predict Future Disability: A Cohort Study

OBJECTIVE

The aim of this study was to determine if headache profile can predict future disability in patients with tension-type headache (TTH).

MATERIALS AND METHODS

Eighty-three individuals with TTH were recruited. To be included in the study participants needed to fulfill the International Headache Society classification's criteria for episodic or chronic TTH form and to be at least 18 years old. Baseline clinical outcomes (headache and neck-related disability, kinesiophobia, self-efficacy, and anxiety) and physical outcomes (neck extensors muscles maximum voluntary contraction) were collected for all participants. A prospective data collection of headache characteristics (intensity and frequency) was conducted using daily SMS or e-mail over a 1-month period. Headache-related disability was assessed at the 3-month follow-up and was used as the disability criterion for TTH.

RESULTS

Correlations showed that the number of years with headache (r=0.53, P<0.001), self-reported neck pain intensity (r=0.29, P=0.025), headache frequency (r=0.60, P<0.001) and intensity (r=0.54, P<0.001), anxiety (r=0.28; P=0.031), as well as neck-related disability (r=0.64, P<0.001) were correlated to headache-related disability assessed at 3 months. Multiple regression showed that these determinants can be used to predict headache disability (R =0.583). Headache frequency (β=0.284) was the best individual predictor.

DISCUSSION

Results showed that TTH frequency and intensity and the presence of concomitant infrequent migraine are predictors of future disability over a 3-month period. Further studies are needed to evaluate the contribution of other potential physical outcomes on headache-related disability.

Spanish Translation and Cultural Adaptation of the Fibromyalgia Knowledge Questionnaire

INTRODUCTION

Fibromyalgia (FM) translates into a reduction in the quality of life of people who suffer from it, being a chronic disease of unknown etiology. One of the most widespread treatments includes the combination of patient education, along with other components. At the educational level, the Fibromyalgia Knowledge Questionnaire (FKQ) is a tool that assesses knowledge of fibromyalgia.

OBJECTIVE

To obtain the translation and cultural adaptation of the FKQ questionnaire into Spanish, as well as its readability, in addition to knowing the relationship between knowledge of the disease and the level of disability.

METHOD

In phase one, a translation-back translation and an evaluation of the readability of the questionnaire was carried out from INFLESZ, while in phase two, the questionnaire was passed to women with FM to detect their knowledge of the disease. A total of 49 women participated, with a mean age of 54.48 years.

RESULTS

The Spanish version of the FKQ questionnaire was rated by the participants in all its items as "clear and understandable". The readability obtained by the questionnaire was similar to its original version, with both totals being in the "normal" range, following the INFLESZ ranges. Regarding the patients' knowledge about FM, the component in which the highest score was obtained was physical activity (80% correct), while the one that obtained the worst score was knowledge about medication (50% correct). In addition, an inverse correlation was obtained between the FKQ and the FIQ (Fibromyalgia Impact Questionnaire) (r = -0.438; p < 0.01).

CONCLUSIONS

The FKQ has been translated and culturally adapted, obtaining a correct understanding by the participants, as well as a degree of readability similar to the original questionnaire. Furthermore, it was obtained that, the lower the level of knowledge of the sick person, the greater the disability.

Transcultural adaptation of the neck disability index to mexican spanish and assessment of its psychometric properties

PURPOSE

To transculturally adapt the Neck Disability Index to Mexican Spanish (NDI-Mx) and to evaluate its psychometric properties.

METHODS

Translation and transcultural adaptation of the NDI were conducted according to published guidelines. The test-retest reliability of the NDI-Mx was assessed with intraclass correlation coefficient (ICC_3,1), the student t-test, standard error of measurement, minimal detectable change and Bland-Altman plot. Cronbach's α coefficient was used to evaluate internal consistency. Floor and ceiling effects were also evaluated. Convergent validity was assessed by comparison of the NDI-Mx with the Northwick Park Neck Pain Questionnaire (NPQ) through the Spearman correlation coefficient. Finally, a confirmatory factor analysis (CFA) was conducted.

RESULTS

The sample was composed of 113 subjects (38 men and 75 women) with a mean age of 30 (SD, 12.19) years. All items of the NDI-Mx showed good test-retest reliability (ICC_3,1 = 0.86) and good internal consistency (Cronbach's α = 0.85). Floor and ceiling effects were not observed. There was good convergent validity with a high correlation between NDI-Mx and NPQ (ρ = 0.83). The CFA revealed that a one-factor solution fitted adequately the data (χ²(32) = 41.18, p = .13).

CONCLUSION

The NDI-Mx seems to be a valid and reliable tool that can be used in clinical practice and research on Mexican populations with neck pain.

Reliability and Validity of Cross Culturally Adapted Punjabi Version of NDI (NDI-P) in Patients with Neck Pain: A Psychometric Analysis

BACKGROUND

Neck disability index (NDI) is one of the commonest patient-reported outcome measures used to evaluate disability related to neck pain. Its application to non-English-speaking Punjabi population is limited as a validated and cross-culturally adapted Punjabi version of NDI is not available. The purpose of the study was to analyze the psychometric properties of Punjabi version of neck disability index (NDI-P) in patients with neck pain.

MATERIALS AND METHODS

The translation and cross-cultural adaptation of Punjabi version of NDI was done according to well-recommended guidelines. The pre-final version was tested on a set of 15 patients and suitable modifications were made. The final version was administered to 100 patients with neck pain of more than 2 weeks duration. Psychometric properties comprising internal consistency, test-re-test reliability, construct validity and factorial structure of the questionnaire were determined.

RESULTS

The developed NDI-P showed excellent internal consistency (Chronbach alpha of NDI-P is 0.87), test-re-test reliability (ICC 0.840) and construct validity (Spearman correlation coefficient with VAS 0.547). Factor analysis proved the questionnaire to be having a 2-factor structure with a total variance of 56.58%.

CONCLUSION

NDI (P) is a reliable and valid instrument for measurement of disability related to neck pain in Punjabi population. It can be used both in research and clinical care settings in future.

Validation of the Nepali versions of the Neck Disability Index and the Numerical Rating Scale for Neck Pain

STUDY DESIGN

A cross-sectional study with a test-retest design.

OBJECTIVE

To translate and culturally adapt the numerical rating scale (NRS) for neck pain intensity and the Neck Disability Index (NDI), and asses their measurement properties in a Nepalese neck pain population.

SUMMARY OF BACKGROUND DATA

Neck pain is one of the most common musculoskeletal disorders in Nepal. Research on neck pain disorders has been hampered by lack of standardized patient-reported outcome measures (PROMs) in Nepali language. Therefore, we aimed at validating a Nepali version of the NDI and NRS neck pain.

METHODS

At Dhulikhel hospital in Nepal, 150 patients with neck pain and/or cervical radiculopathy completed the translated self-administered questionnaires. We had made one cultural adaption of the NDI driving item in the final Nepali version. Relative reliability was analyzed with intraclass correlation coefficient (ICC 2.1) and absolute reliability with the smallest detectable change (SDC). Internal consistency was assessed by Cronbach alpha. Construct and discriminative validity was assessed by Spearman correlation for a priori hypotheses, receiver-operating characteristics curves, and analysis of variance. Time spent and assistance needed to complete the questionnaires were used to assess feasibility.

RESULTS

Test-restest reliability was excellent with ICC (95% confidence intervals) of 0.87 (0.66, 0.94) for NDI and 0.97 (0.94, 0.99) for NRS neck pain. The absolute reliability was acceptable (a SDC of 1.6 for NRS and 9.3 for NDI) and a Cronbach alpha (internal consistency) of 0.70 for NDI, as well as acceptable construct validity, discriminative validity, and feasibility.

CONCLUSION

The Nepali versions of the NRS neck pain and NDI can be recommended for assessing pain and disability among patients with neck pain and cervical radiculopathy, but their responsiveness to change remains to be tested.Level of Evidence: 2.

Impact of load expectations on neuromuscular and postural strategies during a freestyle lifting task in individuals with and without chronic low back pain

Objective

This study aimed to investigate how load expectations modulate neuromuscular and postural strategies in the anticipation of a freestyle lifting task with varying expected loads in individuals with and without chronic low back pain (cLBP).

Methods

Forty-seven participants, 28 with cLBP pain and 19 without, were recruited and completed a series of freestyle lifting trials (3 sets of box lifted for a total of 36 lifts). Verbal cues were used to modulate their expectations about the boxes’ weight: no expectation, lighter or heavier load expectations. Following each set, participants rated their perceived exertion on a visual analog scale. During the lifting protocol, kinematics (time to maximal flexion, angular velocity and joint angles), electromyography muscle activity (erector spinae and quadriceps) and center of pressure displacement were simultaneously recorded.

Results

Results showed that time to maximal knee flexion was modulated by load expectations in both groups (mean lighter load expectations = 1.15 ± 0.32 sec.; mean heavier load expectations = 1.06 ± 0.31 sec.). Results also showed a load expectations X group interaction for that time to maximal hip and lumbar flexion. Time to maximal hip flexion decreased with heavier load expectations (mean lighter load expectations = 1.20 ± 0.36; mean heavier load expectations = 1.16 ± 0.33) for cLBP only. Time to maximal lumbar flexion increased with heavier load expectation (mean lighter load expectations = 1.41 ± 0.27 sec.; mean lighter load expectations = 1.46 ± 0.29 sec.) for participants without LBP. However, no difference in lumbar, hip nor knee angles were observed between groups or conditions. Results highlighted significant load expectation effects for erector spinae electromyography activity, as lower muscle activations was observed for both groups with heavier load expectations (mean = 0.32 ± 0.15), compared to lighter load expectations (mean = 0.52 ± 0.27). Force plates analyses did not reveal any significant load expectation effects.

Conclusion

Present findings showed that load expectations modulate movement strategies and muscle activation similarly but not identically in individuals with chronic low back pain and healthy adults during freestyle lifting. Results of the present study partially differ from previous studies and suggest only minor differences in lifting strategies between healthy individuals and individuals with cLBP experiencing low level of pain and disability. More studies are needed to investigate the potential role of load expectations in the development and persistence of chronic low back pain.

Questionnaires for the evaluation of the cervical and lumbar spine in Italian language: a systematic review of the structural and psychometric characteristics

INTRODUCTION

There has been an increase in the use of questionnaires as tools for the subjective evaluation of patients with neuro-musculoskeletal problems. The aim of this study was to analyze the psychometric properties of the questionnaires published in Italian for the evaluation of cervical and lumbar spine pain and related dysfunction.

EVIDENCE ACQUISITION

Two blinded bibliographical searches were carried out on seven databases, regarding back, lumbar and/or cervical musculoskeletal problems. Both the structural characteristics and the psychometric aspects of each of the questionnaires were extracted from each of the selected articles. The structural characteristics were: full name, acronym, author and date of adaptation to the Italian language, what it measures, number of items, time to complete, the result scale, where the points are located and the cost. The psychometric aspects were: standard error of measurement (SEM), minimum detectable change (MDC), minimal clinically important difference (MCID), test-retest reliability, internal consistency, criterion validity, construct validity and sensitivity to changes.

EVIDENCE SYNTHESIS

For the structural characteristics of the questionnaires identified for the valuation of the lumbar area, the number of items ranged between 10 and 24. Only two of the questionnaires presented specific categories, and the time to complete ranged between 5 and 7 minutes. The reliability of the questionnaires ranged between 0.869 and 0.961. None of the questionnaires calculated the inter-observer reliability. The internal consistency ranged between 0.82 and 0.90 for criterion validity. None of the questionnaires calculated sensitivity, SEM, MDC or MCID, with the exception of the Fear-Avoidance Beliefs Questionnaire, which showed a value of 12 on MDC. For the assessment of the cervical region, the number of items ranged from 6 to 20. Three of the questionnaires had sub-categories, and the time to complete them ranged between 2 and 5 minutes. The test-retest reliability ranged between 0.78 and 0.997. The internal consistency ranged between 0.842 and 0.942.

CONCLUSIONS

The Italian versions of the questionnaires present good basic structural and psychometric characteristics for the evaluation of patients with back, lumbar and/or cervical musculoskeletal disorders. The analysis of the structural and psychometric characteristics of these questionnaires is fundamental to identify the best tools to use in research and in clinical practice.

<p>Radio Electric Asymmetric Conveyer Neurobiological Treatments in Non-Specific Neck Pain: A Retrospective Study</p>

Introduction

Non-specific neck pain (NSNP) is a rather common symptomatology, and various therapeutic approaches are aimed to treat it, in the field of manual therapy, physiotherapy and pharmacology.

Methods

This retrospective study analyzes 65 subjects treated for NSNP with a neurobiological stimulation administered by medical devices based on radio electric asymmetric conveyer (REAC) technology. Initially, a neuro stimulation treatment called neuro postural optimization (NPO) was administered to improve the coordination of muscle activity and reduce adaptive decompensations. Subsequently, the bio stimulation treatment called tissue optimization (TO) was administered to reduce the algodystrophic and muscle contracture component. The evaluation of the efficacy of these treatments was made through the subjective evaluation of pain by the patients. Data were collected by the use of the numeric pain rating scale (NPRS) and neck pain questionnaire (NPQ), administered before the treatments and at the end of the cycle of therapy.

Results

The analysis of the results shows that this type of approach and treatment scheme is effective in reducing the symptoms of NSNP in both male and female subjects, regardless of their age. Other subjective data not quantified in this study but reported by all subjects, during and after the treatment cycle, were a feeling of lower stiffness of neck and shoulder, a reduction in the thickening of the cervicobrachial tissues, and a clear and progressive reduction of pain perception during the skin rolling (SR) maneuver.

Conclusion

The combination of REAC-NPO neuromodulation and REAC-TO biomodulation treatments used in this study was shown to be effective in NPRS.

Cross-cultural adaptation and psychometric evaluation of the Malay version of the Neck Disability Index

Purpose: Translating the Neck Disability Index (NDI) into the Malay language (NDI-M); evaluation of psychometric properties in patients with neck pain.Methods: The NDI-M was translated according to established guidelines. In the first visit, 120 participants completed the NDI-M, visual analogue scale (VAS) for pain and demographic details. 98 participants returned to complete similar questionnaires and the Global Rating of Change (GRoC) scale. The NDI-M was evaluated for internal consistency, test-retest reliability, content validity, construct validity and responsiveness.Results: The NDI-M demonstrated excellent internal consistency (Cronbach's α = 0.84) and good test-retest reliability (ICC_2,1 = 0.79). Content validity was confirmed with no floor or ceiling effects. Construct validity was established revealing three-factor subscales explaining 68% of the total variance. The NDI-M showed a moderate correlation with VAS (R_p = 0.49, p < 0.001). Regarding responsiveness, a moderate correlation between NDI-M change scores and VAS change scores was found (R_p = 0.40, p < 0.001). However, there was no significant correlation between NDI-M with GRoC (R_s = 0.11, p = 0.27).Conclusions: The NDI-M is a reliable and valid tool to measure functional outcomes in patients with neck pain. It is responsive in detecting changes in pain intensity during a patient's rehabilitation journey.Implications for rehabilitationThe NDI was translated into the Malay language and culturally adapted for Malay-speaking patients with neck pain.The NDI-M demonstrated an excellent level of internal consistency and good test-retest reliability. It demonstrated content and construct validity, with three-factor subscales, and moderate responsiveness for pain intensity.The NDI-M is a reliable, valid and responsive instrument to measure functional limitations in patients with neck pain for rehabilitation.

Cross-cultural Adaptation, Reliability, Validity, and Responsiveness of the Simplified-Chinese Version of Neck Disability Index

STUDY DESIGN

Cross-cultural adaptation and psychometric evaluation.

OBJECTIVE

The aim of this study was to translate the Neck Disability Index (NDI) into the simplified-Chinese language and to evaluate the reliability, validity, and responsiveness of the new questionnaire.

SUMMARY OF BACKGROUND DATA

Neck pain is a major health problem resulting in major disability. NDI is the most frequently used scale for self-rating of disability due to neck pain. At present, there is no simplified-Chinese version of the NDI. The aims of this study were to culturally adapt and translate the NDI into the simplified-Chinese language (NDI-SC) and to evaluate its psychometric properties in patients with neck pain.

METHODS

The NDI was translated into simplified-Chinese version based on established guidelines. A total of 70 patients participated in this study. Patients were asked to complete a set of questionnaires comprising of their demographic information, the NDI-SC, and a visual analog scale (VAS) of pain. Fifty-six patients returned after 1 to 2 weeks to complete the same set of questionnaires and the global rating of change (GROC) scale. Then, the NDI-SC was evaluated for content validity, construct validity, internal consistency, test-retest reliability, and responsiveness.

RESULTS

The NDI-SC demonstrated excellent internal consistency (Cronbach α = 0.92) and good test-retest reliability (ICC2,1 = 0.85). Content validity was confirmed as no floor or ceiling effects were detected for the NDI-SC total score. Construct validity was established with factor analysis revealing two-factor subscales explaining 66% of the variance. The NDI-SC showed a strong correlation with VAS (Rp = 0.61, P < 0.001) and a moderate correlation with GROC (Rs = 0.46, P < 0.001). The correlation between NDI-SC change scores and VAS change scores was also moderate (Rp = 0.59, P < 0.001).

CONCLUSION

The results showed that the NDI-SC is a reliable, valid, and responsive instrument to measure functional limitations in patients with neck pain.

LEVEL OF EVIDENCE

3.

Physiotherapy assessment and treatment of chronic subjective tinnitus using mechanical diagnosis and therapy: a case report

Objectives: Tinnitus is the perception of sound without any external auditory stimulus. Cervicogenic somatic tinnitus (CST) is a subset in which symptoms are modulated by maneuvers of the neck. The evidence for effective diagnosis and treatment of CST is limited. Mechanical Diagnosis and Therapy (MDT) is a biopsychosocial assessment and management system that uses the response to mechanical forces to classify clinical presentations accurately. The purpose of this case report is to describe the MDT assessment and management of a patient with chronic subjective tinnitus.Methods: A 67-year-old female with a 5-year history of left-sided subjective tinnitus, neck pain, and headache was referred for physiotherapy. Outcome measures included the Visual Analogue Scale (VAS), Tinnitus Handicap Inventory (THI), and Neck Disability Index (NDI). She was evaluated and treated according to MDT principles with management consisting of individualized directional preference exercises and postural correction.Results: Significant improvements in symptoms, cervical range of motion, function, and psychosocial status were observed over the long-term. At 6 months, THI scores dropped from 62/100 to 18/100 and NDI scores dropped from 18/50 to 3/50.Discussion: A comprehensive MDT assessment led to a classification of Derangement, with treatment focusing on tailored self-management. Contrary to other interventions described for CST, the patient was able to make significant and lasting changes to her symptoms without the need for any externally applied interventions. The emphasis on self-management dovetails well with the biopsychosocial model of care. This case provides preliminary evidence for the utility of screening for Derangement in conservative tinnitus assessments.Level of Evidence: 4.

Cross-cultural adaptation, reliability, and validity of the Turkish version of the Neck OutcOme Score

Background/aim

This study aims to determine the validity and reliability of the Turkish version of the Neck OutcOme Score (NOOS).

Materials and methods

Two hundred eight patients suffering from nonspecific neck pain participated in the study. Test–retest reliability and internal consistency were assessed using intraclass correlation coefficients (2, 1) and Cronbach’s alpha, respectively. The dimensionality was investigated with the factor analysis. The construct validity was determined by testing whether the hypothesis of correlations between NOOS subscales, Short Form-36 subscales, and the Neck Disability Index were met using Spearman’s rank correlation coefficient. Ceiling/floor effects and measurement error were tested as well.

Results

The intraclass correlation coefficient results varied between 0.721 and 0.844. Cronbach’s alpha values of the subscale were found to be between 0.847 and 0.916 in the internal consistency analysis. The factor analysis showed that the questionnaire has five factors. Floor/ceiling effects were considered not to be present.

Conclusion

It was found that the Turkish version of the NOOS is valid and reliable.

Cervicovestibular rehabilitation in adult with mild traumatic brain injury: a randomised controlled trial protocol

Background

Mild traumatic brain injury (mTBI) is an acknowledged public health problem. Up to 25% of adult with mTBI present persistent symptoms. Headache, dizziness, nausea and neck pain are the most commonly reported symptoms and are frequently associated with cervical spine and vestibular impairments. The most recent international consensus statement (2017 Berlin consensus) recommends the addition of an individualized rehabilitation approach for mTBI with persistent symptoms. The addition of an individualized rehabilitation approach including the evaluation and treatment of cervical and vestibular impairments leading to symptoms such as neck pain, headache and dizziness is, however, recommended based only on limited scientific evidence. The benefit of such intervention should therefore be further investigated.

Objective

To compare the addition of a 6-week individualized cervicovestibular rehabilitation program to a conventional approach of gradual sub-threshold physical activation (SPA) alone in adults with persistent headache, neck pain and/or dizziness-related following a mTBI on the severity of symptoms and on other indicators of clinical recovery. We hypothesize that such a program will improve all outcomes faster than a conventional approach (between-group differences at 6-week and 12-week).

Methods

In this single-blind, parallel-group randomized controlled trial, 46 adults with subacute (3 to12 weeks post-injury) persistent mTBI symptoms will be randomly assigned to: 1) a 6-week SPA program or 2) SPA combined with a cervicovestibular rehabilitation program. The cervicovestibular rehabilitation program will include education, cervical spine manual therapy and exercises, vestibular rehabilitation and home exercises. All participants will take part in 4 evaluation sessions (baseline, week 6, 12 and 26) performed by a blinded evaluator. The primary outcome will be the Post-Concussion Symptoms Scale. The secondary outcomes will be time to clearance to return to function, number of recurrent episodes, Global Rating of Change, Numerical Pain Rating Scale, Neck Disability Index, Headache Disability Inventory and Dizziness Handicap Inventory. A 2-way ANOVA and an intention-to-treat analysis will be used.

Discussion

Controlled trials are needed to determine the best rehabilitation approach for mTBI with persistent symptoms such as neck pain, headache and dizziness. This RCT will be crucial to guide future clinical management recommendations.

Trial registration

ClinicalTrials.gov Identifier - NCT03677661, Registered on September, 15th 2018.

[Bilateral breast reduction and obesity: What is the ideal resection enabling significant improvement in back pain according to the body mass index?]

INTRODUCTION

Dorsal pain is the first symptoms about which patients with macromasty complain. Health insurance reimbursement takes place if the resection weight is at least 300grams per breast. However, this weight is not correlated with the body mass index (BMI). In this context, we sought to determine the ideal resection weight leading to significant BMI-based improvement.

MATERIALS AND METHODS

This is a multicentre prospective study of patients operated between November 2016 and July 2017. In the year following the surgical procedure, we studied overall improvement using the INDIC questionnaire. Any INDIC improvement of at least 50% was considered positive. These data were then compared to tissue resection weights and BMI. In order to refine our results, age, bra size, comorbidities and complications were also identified.

RESULTS

Forty-one patients were included in our study. Average age was 41.5±11.4years. Average BMI was 27.9±4.1kg/m². The bra cap chosen after the procedure were C. Average resection weight was 663±352g per breast. The preoperative and postoperative INDIC scores were 734.9±226.6 points and 225.3±319.1 points, respectively (P=0.001). Significant improvement was achieved at 12months in 71.8% of patients. A correlation of 38.7g/kg/m² was found between breast resection weight and BMI.

CONCLUSION

This study clarifies the correlation between the breast resection weight required to relieve optimal back pain and BMI. It defines three categories of patients: patients with standard weights (18<BMI<25), overweight (25<BMI<30) and obese (BMI>30). Overweight and obese patients require greater tissue excretion to be relieved optimally. These findings underline a need to adjust the health insurance threshold for these types of patients.

Cross-cultural adaptation of the Neck Pain and Disability Scale: a methodological systematic review

BACKGROUND

Neck pain is a common and uncomfortable symptom, adversely affecting the work and life of those affected. The Neck Pain and Disability Scale (NPDS) is widely used in neck pain assessment. It has been cross-culturally adapted into several languages to extend its reach to non-English-speaking countries. The aim of this study was to comprehensively evaluate the translation procedures and measurement properties of cross-cultural adaptations of the NPDS.

METHOD

We searched multiple databases, including PubMed, Embase, CINAHL, SciELO, PsycINFO, Medline, SinoMed, PsycINFO, Web of Science, and Scopus, using the keywords "Neck Pain and Disability Scale," "NPDS," "cross-cultural," and "translation". Cross-cultural adaptation and quality control of measurement properties of adaptation procedures were independently conducted by two reviewers in accordance with Guidelines for the Process of Cross-Cultural Adaptation of Self-Report Measures and Quality Criteria for Psychometric Properties of Health Status Questionnaire.

RESULTS

There are 15 adaptations of NPDS in 11 different languages with multiple versions in Korean, simplified Chinese and Turkish with 19 studies. In about half of these studies, forward and back translations were conducted. Specially, they mostly focus on the synthesis phase of the translations. Only the simplified-Chinese-2011 adaptation meets the standards of composition due to the existence of an expert committee. Internal consistency, reliability, and construct validity have been evaluated in most existing eligible articles. Half of these articles tested ceiling and floor effects, and only a few included agreement responsiveness and interpretability.

CONCLUSION

The Italian (publication 1 and 2), Persian-Iranian, simplified-Chinese-2011, and Thai adaptations show better quality than others with regard to cross-cultural adaptation and measurement properties. Further studies should fully assess the measurement properties of the NPDS in the Dutch (publication 1 and 2), Hindi-Indian, Korean-2013, simplified-Chinese-2010, Turkish-2004, and Turkish-2007 adaptations.

Comparing neck extensor muscle function in asymptomatic Canadian adults and adults with tension-type headache: a cross-sectional study

AIM

To further the understanding of the pathophysiological mechanisms underlying tension-type headache (TTH) by comparing the endurance and strength of neck extensor muscles under acute muscle fatigue in participants with TTH and asymptomatic participants.

METHODS

We conducted a cross-sectional analysis of neck extensor muscle performance. Asymptomatic participants and participants with TTH were recruited via social media platforms and from the Université du Québec à Trois-Rivières community and employees. A total of 44 participants with TTH and 40 asymptomatic participants took part in an isometric neck extensor endurance task performed at 60% of their maximum voluntary contraction. Inclusion criteria for the headache group were to be older than 18 years old and to fulfil the International Headache Society classification's criteria for either frequent episodic or chronic TTH. Clinical (self-efficacy, anxiety, neck disability and kinesiophobia) and physical parameters (neck extensors maximum voluntary contraction, endurance time, muscle fatigue) as well as characteristics of headache episodes (intensity, frequency and associated disability) were collected for all participants. Surface electromyography was used to document upper trapezius, splenius capitis and sternocleidomastoids muscle activity and muscle fatigue.

RESULTS

Both groups displayed similar neck extensor muscle endurance capacity with a mean difference of 6.2 s (p>0.05) in favour of the control group (control=68.1±32.3; TTH=61.9±20.1). Similarly, participants in the headache group showed comparable neck extensor muscle strength (95.9±30.4 N) to the control group (111.3±38.7 N). Among participants with TTH, those scoring as severely incapacitated by headaches were the ones with higher neck-related disability (F[1,44]=10.77; p=0.002), the more frequent headache episodes (F[1,44]=6.70; p=0.01) and higher maximum headache intensity (F[1,44]=10.81; p=0.002).

CONCLUSION

A fatigue task consisting of isometric neck extension cannot efficiently differentiate participants with TTH from asymptomatic participants.

Translation, reliability, and validity of the Turkish version of the Neck Bournemouth Questionnaire

Objectives

The aim of this study was to translate the Neck Bournemouth Questionnaire into Turkish and to test the reliability and validity of the Turkish version of the Neck Bournemouth Questionnaire (BQc-t).

Patients and methods

Between June 2014 and July 2015, a total of 97 patients with neck pain (27 males, 70 females; mean age 46.6±10.6 years; range, 18 to 65 years) were included in the study. The patients underwent a physical therapy and rehabilitation program. For translation, the American Association of Orthopedic Surgeons guideline was used. The reliability was measured with internal consistency and test-retest by calculation of the Cronbach alpha and intraclass correlation coefficient (ICC) respectively. Internal construct validity of the BQc-t was analyzed with confirmatory factor analysis. For external construct validity, the correlations between the BQc-t results and the Neck Pain and Disability Scale (NPAD), Modified Neck Disability Index (MNDI), and Short Form-36 (SF-36) were analyzed before and after treatment. Responsiveness was calculated as the effect size (ES) and standardized response mean (SRM). Minimal detectable change (MDC) score was calculated to evaluate interpretability.

Results

The ICC value for test-retest of total score was 0.945. Pre- and post-treatment Cronbach alpha coefficients were 0.877 and 0.907, respectively, showing that the reliability of the BQc-t was considerably high. Confirmatory factor analysis showed that questions were found to cluster in a single dimension. In terms of the external construct validity, there was a positive statistically significant correlation between the BQc-t questions, except for Question 7, and relevant subscales of the NPAD and MNDI. There was also a negative statistically significant correlation between the BQc-t questions and SF-36 subgroups. The ES and SRM were 1.23 and 1.48, respectively. The MDC was 20.31.

Conclusion

Our study results show that the BQc-t is reliable, valid, and sensitive to clinical changes.

Comparison of three CT-guided epidural steroid injection approaches in 104 patients with cervical radicular pain: transforaminal anterolateral, posterolateral, and transfacet indirect

INTRODUCTION

The treatment of persistent cervical radicular pain (CRP) by CT-guided epidural steroid injections (CTESI) by a transforaminal anterolateral (TFA) approach is associated with rare but serious complications. Two recently described transforaminal posterolateral (TFP) and transfacet indirect (TFT) approaches may be safer options, but have not been extensively evaluated. We compared the efficacy of three CTESI approaches (TFA, TFP, and TFT) in the treatment of persistent CRP (>6 weeks).

METHODS

Patients were prospectively assessed for pain using the visual analog scale (VAS) and for functional disability by the Neck Disability Index (NDI) before treatment, then 6 weeks and 6 months after CTESI.

RESULTS

A total of 104 patients were included (n = 30 TFA, n = 36 TFP, and n = 38 TFT approaches). Each group was found to have a statistically significant improvement at 6 weeks (median VAS values: 7 (2-9) at D0 and 2 (3-6) at 6 weeks p < 0.01; median NDI values: 38 (24-50) at D0 and 29 (18-42) at 6 weeks (p < 0.01)), and at 6 months (median VAS values: 7 (2-9) at D0 and 4 (2-6) at 6 months (p < 0.01); median NDI values: 38 (24-50) at D0 and 28 (13-40) at 6 months (p < 0.01)). No significant difference was observed in the decrease in VAS and NDI scores among the three approaches at 6 weeks (p = 0.635 and p = 0.54 for VAS and NDI respectively) or 6 months (p = 0.704 and p = 0.315 for VAS and NDI respectively). No major complications were noted.

CONCLUSION

The results of CTESI using the TFP or TFT approach are similar to those for TFA in the treatment of persistent CRP and could be a safer option.

Development and Validation of Taiwanese Version of the Neck Disability Index

STUDY DESIGN

Cross-cultural adaptation and cross-sectional psychometric testing in a convenience sample of patients with neck pain.

OBJECTIVE

To translate and cross-culturally adapt the Neck Disability Index (NDI) into a Taiwanese version and to assess the psychometric properties.

SUMMARY OF BACKGROUND DATA

The Taiwanese NDI has not been developed or validated.

METHODS

The NDI was first translated and culturally adapted to the Taiwanese version. The test-retest reliability within 1 week was examined (n = 32). The factor structure was assessed by confirmatory factor analysis (n = 137). The construct validity was assessed by examining the relationship between the NDI and other well-known measures (n = 137).

RESULTS

The Taiwanese version was successfully translated and cross-culturally adapted. The internal consistency was excellent, with Cronbach α = 0.89. High test-retest reliability was demonstrated with intraclass correlation coefficients of 0.87. The minimal detectable change was 8.74. The two-factor model (pain and function factors) was better than the one-factor model, with higher factor loadings and better goodness-of-fit statistics. The convergent validity was supported by moderate correlation of the pain factor with the Visual Analogue Scale (|rho| = 0.45), and high correlation of the function factor with the physical component summary of the Short-From 36 (SF-36) (|rho| = 0.60).

CONCLUSION

The Taiwanese NDI is a reliable and valid disease-specific measure for assessment of pain and functional status in patients with neck pain.

LEVEL OF EVIDENCE

3.

Beliefs in the population about cracking sounds produced during spinal manipulation

OBJECTIVES

To examine beliefs about cracking sounds heard during high-velocity low-amplitude (HVLA) thrust spinal manipulation in individuals with and without personal experience of this technique.

METHODS

We included 100 individuals. Among them, 60 had no history of spinal manipulation, including 40 who were asymptomatic with or without a past history of spinal pain and 20 who had nonspecific spinal pain. The remaining 40 patients had a history of spinal manipulation; among them, 20 were asymptomatic and 20 had spinal pain. Participants attended a one-on-one interview during which they completed a questionnaire about their history of spinal manipulation and their beliefs regarding sounds heard during spinal manipulation.

RESULTS

Mean age was 43.5±15.4years. The sounds were ascribed to vertebral repositioning by 49% of participants and to friction between two vertebras by 23% of participants; only 9% of participants correctly ascribed the sound to the formation of a gas bubble in the joint. The sound was mistakenly considered to indicate successful spinal manipulation by 40% of participants. No differences in beliefs were found between the groups with and without a history of spinal manipulation.

CONCLUSIONS

Certain beliefs have documented adverse effects. This study showed a high prevalence of unfounded beliefs regarding spinal manipulation. These beliefs deserve greater attention from healthcare providers, particularly those who practice spinal manipulation.

Return to work helps maintain treatment gains in the rehabilitation of whiplash injury

This study examined the relation between return to work and the maintenance of treatment gains made over the course of a rehabilitation intervention. The study sample consisted of 110 individuals who had sustained whiplash injuries in rear collision motor vehicle accidents and were work-disabled at the time of enrolment in the study. Participants completed pre- and post-treatment measures of pain severity, disability, cervical range of motion, depression, posttraumatic stress symptoms, and catastrophizing. Pain severity was assessed again at 1-year follow-up. At 1-year follow-up, 73 participants had returned to work and 37 remained work-disabled. Analyses revealed that participants who returned to work were more likely to maintain treatment gains (77.5%) than participants who remained work-disabled (48%), χ = 6.3, P < 0.01. The results of a regression analysis revealed that the relation between return to work and the maintenance of treatment gains remained significant (β = 0.30, P < 0.01), even when controlling for potential confounders such as pain severity, restricted range of motion, depression, and pain catastrophizing. The Discussion addresses the processes by which prolonged work-disability might contribute to the failure to maintain treatment gains. Important knowledge gaps still remain concerning the individual, workplace, and system variables that might play a role in whether or not the gains made in the rehabilitation of whiplash injury are maintained. Clinical implications of the findings are also addressed.

Urdu version of the neck disability index: a reliability and validity study

Background

Despite the wide use of the neck disability index (NDI) for assessing disability in patients with neck pain, the NDI has not yet been translated and validated in Urdu. The first purpose of the present study was to translate and cross-culturally adapt the NDI into the Urdu language (NDI-U). The second purpose was to investigate the reliability, validity and responsiveness of the NDI-U in Urdu-speaking patients experiencing chronic mechanical neck pain (CMNP).

Methods

Translation and cross-cultural adaptation of the original version of the NDI were carried out using previously described procedures. Seventy-six patients with CMNP and thirty healthy participants were recruited for the study. NDI-U and visual analogue scales for pain intensity (VAS_pain) and disability (VAS_disability) were administered to all the participants at baseline and to the patients 3 weeks after receiving physiotherapy intervention. The global rating of change scale (GROC) was also administered at this time. Test-retest reliability and internal consistency were carried out on forty-six randomly selected patients two days after they completed the NDI-U. The NDI-U was evaluated for factor analysis, content validity, construct validity (discriminative and convergent validity) and responsiveness.

Results

An intra-class correlation coefficient (ICC_2,1) revealed excellent test-retest reliability for all items (ICC_2,1 = 0.86–0.98) and total scores (ICC_2,1 = 0.99) of the NDI-U. The NDI-U was found internally consistent with a Cronbach’s alpha of 0.90 and a fair to good correlation between single items and the NDI-U total scores (r = 0.34 to 0.89). Factor analysis of the NDI-U produced two factors explaining 66.71% of the variance. Content validity was good, as no floor or ceiling effects were detected for the NDI-U total score. To determine discriminative validity, an independent t-test revealed a significant difference in the NDI-U total scores between the patients and healthy controls (P < 0.001). For convergent validity, Pearson’s correlation coefficient showed a strong correlation between NDI-U and VAS_disability (r = 0.83, P < 0.001) and a moderate correlation between NDI-U and VAS_pain (r = 0.62, P < 0.001). To measure responsiveness, an independent t-test showed a significant difference in the NDI-U change scores between the stable and the improved groups (P < 0.001). Furthermore, moderate correlations were found between the NDI-U change scores and the GROC (r = 0.50, P < 0.001), VAS_disability change scores (r = 0.58, P < 0.001) and VAS_pain change scores (r = 0.55, P < 0.001).

Conclusion

The results showed that the NDI-U is a reliable, valid and responsive questionnaire to measure disability in Urdu-speaking patients with CMNP.

Electronic supplementary material

The online version of this article (doi:10.1186/s12891-017-1469-5) contains supplementary material, which is available to authorized users.

The Use of Neck Support Pillows and Postural Exercises in the Management of Chronic Neck Pain

Objective.

Chronic neck pain is a common problem with a profound effect on quality of life. Identifying evidence-based management strategies is fundamental in improving patient outcomes. This study is a reanalysis of the data from Helewa, et al to further characterize the effects of postural exercises and neck support pillows on neck pain.

Methods.

A full factorial model was used. All interactions were analyzed adjusting for the Northwick Park Neck Pain Questionnaire (NPQ) at baseline.

Results.

Postural exercises significantly decreased NPQ scores at ≥ 3 weeks, and the use of a neck support pillow significantly decreased NPQ scores at ≥ 12 weeks.

Conclusion.

These interventions could be beneficial in reducing neck pain symptoms.

Patient-reported outcome measures for non-specific neck pain validated in the Italian-language: a systematic review

BACKGROUND

Patient-reported outcome measures can improve the management of patients with non-specific neck pain. The choice of measure greatly depends on its content and psychometric properties. Most questionnaires were developed for English-speaking people, and need to undergo cross-cultural validation for use in different language contexts. To help Italian clinicians select the most appropriate tool, we systematically reviewed the validated Italian-language outcome measures for non-specific neck pain, and analyzed their psychometric properties and clinical utility.

METHODS

The search was performed in MEDLINE, EMBASE, CINAHL, Scopus, Web of Science, and Cochrane Library. All articles published in English or Italian regarding the development, translation, or validation of patient-reported outcome measures available in the Italian language were included. Two reviewers independently selected the studies, extracted data, and assessed methodological quality using the COSMIN checklist.

RESULTS

Out of 4891articles screened, 66 were eligible. Overall, they were of poor or fair methodological quality. Four instruments measuring function and disability (Neck Disability Index, Neck Pain and Disability Scale, Neck Bournemouth Questionnaire, and Core Outcome Measures Index), and one measuring activity-related fear of movement (NeckPix©) were identified. Each scale showed some psychometric weaknesses or problems with functioning, and none emerged as a gold standard.

CONCLUSIONS

Several patient-reported outcome measures are now available for assessing Italian people with non-specific neck pain. While the Neck Disability Index is the one most widely used, the Neck Bournemouth Questionnaire appears the most promising tool from a psychometric point of view.

Translation, Validation, and Crosscultural Adaptation of the Hebrew Version of the Neck Disability Index

STUDY DESIGN

The present study's design was translation and crosscultural validation of the Neck Disability Index (NDI).

OBJECTIVE

The aim of the study was to translate and culturally adapt the NDI into Hebrew language and to evaluate the psychometric properties of this version.

SUMMARY OF BACKGROUND DATA

As yet, no Hebrew language neck pain and disability questionnaires exist. The NDI is widely used and validated among different patient populations with neck pain.

METHODS

The English version of the NDI was translated into Hebrew according to the published guidelines. A total of 100 patients with neck pain participated in the study. Inclusion criteria were age 18 years and older, neck pain, and ability to read and speak Hebrew. Exclusion criteria were cancer or suspected tumor, neck pain related to vertebral fracture, or neurological disease. Participants were asked to complete the NDI-Hebrew version (NDI-H), Numeric Pain Rating Scale (NPRS), and Patient-Specific Functional Scale (PSFS). Seventy-three patients completed the NDI-H twice in an interval of 2 days. Psychometric properties included test-retest reliability (intraclass correlation coefficient), internal consistency (Cronbach α), convergent validity (Pearson correlation), and factor analysis.

RESULTS

The NDI-H demonstrated excellent test-retest reliability (intraclass correlation coefficient ranged from 0.827 to 0.929; Pv < 0.001). Cronbach α value was excellent (0.855). A very good correlation was found between the NDI-H and NPRS scores (r = 0.611, P < 0.001) and a good correlation between the NDI-H and PSFS score (r = 0.417, P < 0.001). Factor analysis revealed a two-factor solution representing daily function and pain and symptoms.

CONCLUSION

The NDI-H is a valid and reliable instrument to measure functional limitations and disability in Hebrew-speaking patients with neck pain.

LEVEL OF EVIDENCE

NA.

Five years after the accident, whiplash casualties still have poorer quality of life in the physical domain than other mildly injured casualties: analysis of the ESPARR cohort

Background

This study aims to compare health status and quality of life five years after a road accident between casualties with whiplash versus other mild injuries, to compare evolution of quality of life at 1 and 5 years after the accident, and to explore the relation between initial injury (whiplash vs. other) and quality of life.

Methods

The study used data from the ESPARR cohort (a representative cohort of road accident casualties) and included 167 casualties with “pure” whiplash and a population of 185 casualties with other mild injuries (MAIS-1). All subjects with lesions classified as cervical contusion (AIS code 310402) or neck sprain (AIS code 640278) were considered as whiplash casualties. Diagnosis was made by physicians, at the outset of hospital care, based on interview, clinical findings and X-ray. Whiplash injuries were then classified following the Quebec classification (grades 1 and 2). Quality of life was assessed on the WHOQoL-Bref questionnaire. Correlations between explanatory variables and quality of life were explored by Poisson regression and variance analysis.

Results

Between 1 and 5 years, global QoL improved for both whiplash and non-whiplash casualties; but, considering the two whiplash groups separately, improvement in grade 2 was much less than in grade 1. At 5 years, grade-2 whiplash casualties were more dissatisfied with their health (39.4 %; p < 0.05) than non-whiplash (24.3 %) or grade-1 whiplash casualties (27.0 %). Deteriorated quality of life in the mental, social and environmental domains was mainly related to psychological and socioeconomic factors for both whiplash and other mildly injured road-accident casualties. While PTSD was a major factor for the physical domain, whiplash remained a predictive factor after adjustment on PTSD; unsatisfactory health at 5 years, with deteriorated quality of life in the physical domain, was observed specifically in the whiplash group, pain playing a predominant intermediate role.

Conclusions

Deteriorated quality of life in the physical domain remained 5 years after the accident, specifically in the grade-2 whiplash group, pain playing a predominant intermediate role, which may be in line with the hypothesis of neuropathic pain.

The Neck Disability Index-Russian Language Version (NDI-RU): A Study of Validity and Reliability

STUDY DESIGN

Cross-cultural adaptation and psychometric testing.

OBJECTIVE

To perform a validated Russian translation and then to evaluate the validity and reliability of the Russian language version of the Neck Disability Index (NDI-RU).

SUMMARY OF BACKGROUND DATA

Neck pain is highly prevalent and can greatly affect daily activity. The Neck Disability Index (NDI) is the most frequently used scale for self-rating of disability due to neck pain. Its translated versions are applied in many countries. However, the Russian language version of the NDI has not been developed yet.

METHODS

Cross-cultural adaptation of the NDI-RU was performed according to established guidelines. Then, the NDI-RU was evaluated for content validity, concurrent criterion validity, internal consistency, test-retest reliability, factor structure, and minimum detectable change.

RESULTS

Two hundred thirty-two patients took part in the study in total: 109 in validity (39.5 ± 10 yr), 123 in reliability (38.4 ± 11 yr; 80 in the test-retest phase). A culturally valid translation was achieved. NDI-RU total scores were distributed normally. Floor/ceiling effects were absent. Good values of Cronbach α were obtained for each item (from 0.80 to 0.84) and for the total NDI-RU (0.83). A 2-factor solution was found for the NDI-RU. The average interitem correlation coefficient was 0.53. Intraclass correlation coefficients for test-retest reliability coefficients ranged from 0.65 to 0.92 for different items and 0.91 for the total NDI-RU. Moderate correlation (Spearman rs = 0.62; P < 0.05) was found between the NDI-RU total score and graphic rating scalepain score. Completion of the NDI-RU takes 3.6 ± 1 minutes.

CONCLUSION

The development of a Russian language version of the Neck Disability Index resulted in a valid, reliable instrument that can be used both in clinical practice and scientific investigations.

LEVEL OF EVIDENCE

1.

A systematic review of cross-cultural adaptation of the neck disability index

STUDY DESIGN

Systematic review of cross-cultural adaptation.

OBJECTIVE

To perform a systematic review of cross-cultural adaptations of the Neck Disability Index (NDI) and to give a critical assessment to improve its translation.

SUMMARY OF BACKGROUND DATA

The NDI is used to assess functional capacity and physical activity in patients with neck pain, but the quality of its cross-cultural adaptations has not been systematically reviewed.

METHODS

PubMed, Cochrane Library, and EMBASE were searched up through 2013 to identify studies of cross-cultural NDI adaptations. Search terms were "Neck Disability Index" or "NDI" and "cross-cultur*" or "cultur*" or "valid*" or "equivalence" or "transl*." Data were extracted and study quality was assessed.

RESULTS

Twenty-four different NDI versions were identified from 14 different languages/cultures. Most reported forward and back translation and pretesting, but sample size was a problem for most studies. The Cronbach α was generally acceptable, and 13 versions met the criterion of reliability by reporting an intraclass correlation coefficient of 0.70 or more, although some versions did not reach the minimal intraclass correlation coefficient. Eleven versions tested ceiling and floor effects, but only 1 Japanese version reported a floor effect. No study reported interpretability, and none provided the minimal important change or minimal important difference.

CONCLUSION

The Arabic, Italian, and Thai versions were of higher quality than the other versions according to the overall assessment of the 3 checklists. The Catalan, Chinese, Japanese, Korean, Thai, and Turkish versions need more research according to the Quality Criteria for Psychometric Properties of Health Status Questionnaire. Pretest sample size was not large enough in most cases.

LEVEL OF EVIDENCE

1.

Cultural adaptation, reliability, and validity of neck disability index in Indian rural population: a Marathi version study

STUDY DESIGN

A cross-sectional study to develop a cultural adaptation of the Marathi-neck disability index (NDI) and to investigate its validity and reliability.

OBJECTIVE

To conduct a study concerning the cultural adaptation of the NDI and investigate the validity and reliability of its Marathi version in patients with neck pain.

SUMMARY OF BACKGROUND DATA

The NDI is a reliable instrument for evaluating self-rated disability due to neck pain, but there is no published Marathi version and also it has not been tested on a rural population yet. Successful linguistic and cultural translation may allow appropriate cross-cultural comparison for clinical and laboratory research analysis, even in the rural parts of the Maharashtra state of India, where English is not the language of communication.

METHODS

Eighty-one patients having neck pain for at least 3 months were included in the study. The NDI and visual analogue scale for pain were completed by all subjects. Test-retest reliability was determined by using intraclass correlation coefficient and Pearson correlation analysis. For the determination of construct validity, the relation between the NDI and visual analogue scale was examined by Pearson correlation analysis.

RESULTS

Intraclass correlation coefficient score for test-retest reliability was 0.95 and the Cronbach α was 0.97. For construct-related validity the correlation of the NDI-Marathi version was found to be 0.95 (P < 0.0001). These results showed that the construct validity of the Marathi version of the NDI was excellent.

CONCLUSION

The results suggest that the Marathi version of the NDI that is validated in this study is an easy to comprehend, reliable, and valid instrument for the measurement for the limitation of activities of daily living and pain caused by neck disorders in the Marathi-speaking population.