Perioperative Predictors in Patients Undergoing Lateral Lumbar Interbody Fusion for Minimum Clinically Important Difference Achievement

OBJECTIVE

To identify perioperative predictors of minimum clinically important difference (MCID) for patients undergoing lateral lumbar interbody fusion (LLIF) for the patient-reported outcome measures (PROMs) of Patient-Reported Outcomes Measurement Information System Physical Function (PROMIS-PF), Visual Analog Scale (VAS) Back, VAS Leg, Oswestry Disability Index (ODI), and Patient Health Questionnaire-9 (PHQ-9).

METHODS

Patients undergoing LLIF were identified through retrospective review of a single-surgeon database. Overall MCID achievement was determined as the number of unique patients achieving ΔPROM thresholds of PROMIS-PF=4.5, VAS Back=2.1, VAS Leg=2.8, ODI=14.9, and PHQ-9=3.0 over a 2-year postoperative time period. Univariate and multivariable logistic regression were utilized to determine perioperative predictors for MCID achievement.

RESULTS

Two-hundred and ninety patients were identified. For PROMIS-PF MCID achievement, increased preoperative PROMIS-PF and POD 1 VAS pain were significant negative predictors. For VAS Back, primary fusion with revision decompression was a negative predictor, while increased preoperative VAS Back was a positive predictor of MCID achievement. For VAS Leg, increased preoperative VAS Leg was a positive predictor. For ODI, increased POD 0 VAS pain was a negative predictor, while increased preoperative ODI was a positive predictor. For PHQ-9, increased preoperative PHQ-9 was a positive predictor.

CONCLUSION

In patients undergoing LLIF, perioperative predictors for MCID achievement were highly dependent on PROM. Preoperative PROM was the most consistent perioperative predictor for achieving MCID. Elevated acute postoperative pain and primary fusion after failed index decompression were significant predictors of failing to achieve MCID. Surgeons may use these findings in prognostication and management of postoperative expectations.

Poor mental health scores correlate with inferior outcomes following minimally invasive transforaminal lumbar interbody fusion

BACKGROUND

Limited spine literature has studied the strength of association of mental health with other outcomes at time of survey collection. We aim to evaluate the degree to which mental health correlates with outcomes in patients undergoing minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) at several postoperative periods.

METHODS

Patients having undergone elective MIS-TLIF were searched within a retrospective single-surgeon database. Five hundred eighty-five patients were included. Patient-reported outcomes (PROs) including Patient-Reported Outcome Measurement Information System Physical Function (PROMIS PF), 12-item Short Form Physical Component Score (SF-12 PCS) and Mental Component Score (SF-12 MCS), Patient Health Questionnaire-9 (PHQ-9), Visual Analog Scale (VAS) back and leg pain, and Oswestry Disability Index (ODI) scores were collected preoperatively and at 6-week, 12-week, 6-month, 1-year, and 2-year periods. Pearson's correlation tests were used to evaluate the association between both SF-12 MCS and PHQ-9 scores to other PROs at each period.

RESULTS

SF-12 MCS correlated with PROMIS PF (|r|= 0.308-0.531), SF-12 PCS (|r|= 0.207-0.328), VAS back (|r|= 0.279-0.474), VAS leg (|r|= 0.178-0.395), and ODI (|r|= 0.450-0.538) at all time points (P ≤ 0.021, all) except for preoperative SF-12 PCS and 1-year VAS leg. PHQ-9 correlated with PROMIS PF (|r|= 0.366-0.701), SF-12 PCS (|r|= 0.305-0.568), VAS back (|r|= 0.362-0.714), VAS leg (|r|= 0.319-0.694), and ODI (|r|= 0.613-0.784) at all periods (P < 0.001, all).

CONCLUSION

Poor mental health scores were correlated with lower physical function, elevated pain scores, and higher disability. PHQ-9 scores demonstrated stronger correlation in all relationships compared to SF-12 MCS. Optimization of patient mental health may lead to improved patient perception regarding function, pain, and disability following MIS-TLIF.

Influence of Prolonged Duration of Symptoms Prior to MIS-TLIF in a Workers' Compensation Population

OBJECTIVE

To assess the potential effect of preoperative symptom duration on PROs in WC patients undergoing MIS-TLIF.

METHODS

WC patients who had undergone primary, elective MIS-TLIF with recorded duration of symptoms (DOS) data were included. Two cohorts were generated: Lesser Duration (LD; DOS<1 year) and Prolonged Duration (PD; DOS>1 year). PROs were collected preoperatively and at several periods up to 1-year postoperatively. PROs were compared within and between cohorts. Achievement rates of MCID were compared between cohorts.

RESULTS

145 patients were included, with 76 in the PD cohort. The LD cohort demonstrated improvement in PROMIS-PF at 6-months/1-year, ODI at 12-weeks/6-months, VAS back at 6-weeks/12-weeks/6-months, and VAS leg at all postoperative periods (p≤0.015, all). The PD cohort demonstrated improvement in PROMIS-PF at 12-weeks/6-months, ODI at 6-weeks/12-weeks/6-months, and VAS back and VAS leg at all postoperative periods (p≤0.007, all). Between cohorts, all preoperative PROs were superior in the LD cohort (p<0.001, all). The LD cohort reported better PROMIS-PF at 6-months/1-year and ODI at 1-year (p≤0.037, all). The PD cohort was more likely to achieve MCID in ODI at 6-weeks/12-weeks, VAS back at 6-weeks, and VAS leg at 6-weeks, 1-year and Overall (p≤0.036, all).

CONCLUSION

Independent of preoperative symptom duration, WC patients demonstrated improvements in physical function and pain following MIS-TLIF. Patients with greater symptom duration reported inferior function and pain preoperatively. Patients with longer duration of symptoms prior to intervention were more likely to demonstrate clinically significant improvements in disability and pain.

Aberrant right subclavian artery: a case of vertebrobasilar insufficiency

Aberrant right subclavian artery (ARSA) is a rare congenital malformation, wherein the aorta gives rise to the right subclavian artery as a branch off the aortic arch distal to the takeoff of the left subclavian artery. We presented a case of a patient with ARSA that manifested vertebrobasilar symptoms. PubMed search was preformed using keywords 'aberrant right subclavian artery', 'right subclavian steal' and 'vertebrobasilar', which generated nine articles. We found only seven case reports through a PubMed search that discuss ARSA in association with Subclavian steal syndrome. Approximately 71% (n = 5) of the patients in our literature review manifested with signs and symptoms of vertebrobasilar insufficiency. Given the complex anatomy in this condition, treatment should be aimed at symptom resolution. Carotid-subclavian bypass ultimately resolved the symptoms in our patient. Management in symptomatic patient is surgical. In addition to open technique, endovascular interventions can be an option.

Establishing Minimum Clinically Important Difference Thresholds for Physical Function and Pain in Patients Undergoing Anterior Lumbar Interbody Fusion

OBJECTIVE

To establish minimum clinically important difference (MCID) in anterior lumbar interbody fusion (ALIF) for the physical function PROMs Patient-Reported Outcomes Measurement Information System Physical Function (PROMIS-PF), 12-Item Short Form (SF-12) Physical Component Score (PCS), and Veterans RAND-12 (VR-12) PCS and pain PROMs Visual Analog Scale (VAS) Back and VAS Leg through anchor- and distribution-based calculations.

METHODS

Patients undergoing ALIF with preoperative and 6-month Oswestry Disability Index (ODI) were included. Using ODI as the anchor, anchor-based calculation methods were the average change, minimum detectable change (MDC), and receiver operating characteristic (ROC) curve methods. Distribution-based methods were the standard error of measurement (SEM), receiver change index (RCI), effect size, and 0.5ΔSD.

RESULTS

51 patients were identified. Anchor-based methods ranged from 2.9-11.5 for PROMIS-PF, 8.2-13.6 for SF-12 PCS, 7.8-16.8 for VR-12 PCS, 0.5-3.9 for VAS Back, and 1.0-3.4 for VAS Leg. AUC ranged from 0.59 (VAS Back) to 0.78 (VR-12 PCS). Distribution-based methods ranged from 1.0-4.2 for PROMIS-PF, 1.8-12.2 for SF-12 PCS, 1.9-6.2 for VR-12 PCS, 0.4-1.6 for VAS Back, and 0.5-1.7 for VAS Leg.

CONCLUSION

The MCID values greatly relied on the calculation method. The minimum detectable change method was selected as the most appropriate MCID calculation method. The MCID values that may be utilized for ALIF patients are 7.3 for PROMIS-PF, 8.2 for SF-12 PCS, 7.8 for VR-12 PCS, 3.2 for VAS Back, and 2.2 for VAS Leg.

Leptomeningeal disease as a presenting feature of gestational trophoblastic neoplasia: A review and recommendations for management

OBJECTIVES

Gestational Trophoblastic Neoplasia (GTN) is a rare group of malignant placental-related tumours requiring systemic anti-cancer treatment. Leptomeningeal disease (LMD) related to GTN is not well reported with no consensus in optimal treatment. We offer recommendations for management of these patients.

METHODS

We discuss five patients with GTN who presented with features of LMD and were diagnosed with gadolinium-enhanced MRI brain, all of whom received low dose induction etoposide-cisplatin (EP) followed by either EP-etoposide, methotrexate (CNS) and actinomycin-D (EMA) or EMA(CNS)-cyclophosphamide and vincristine (CO).

RESULTS

Four out of the five patients additionally received intrathecal methotrexate. Four patients had complete hCG response to first line multi-agent chemotherapy, one patient required second line paclitaxel, cisplatin alternating with paclitaxel, etoposide (TP/TE), where paclitaxel was substituted with nab-paclitaxel due to anaphylaxis, followed by hysterectomy. One of the four initial complete hCG responders relapsed in the lung requiring further systemic treatment with subsequent lobectomy. Patient reported outcomes indicate persistent neurological symptoms are mild and do not affect functionality and quality of life.

CONCLUSION

With a follow-up range of 2-6 years, all five patients remain cured demonstrating excellent survival outcomes with the avoidance of whole-brain radiotherapy in all cases.

Impact of body mass index on PROMIS outcomes following lumbar decompression

BACKGROUND

No studies have examined the impact of body mass index (BMI) on newer Patient-Reported Outcomes Measurement Information System (PROMIS) outcomes in patients undergoing lumbar decompression (LD).

METHODS

Patients undergoing LD with preoperative PROMIS measures were stratified into four cohorts: normal (18.5 ≤ BMI < 25 kg/m²), overweight (25 ≤ BMI < 30 kg/m²), obese I (30 ≤ BMI < 35 kg/m²), and obese II-III (BMI ≥ 35 kg/m²). Demographics, perioperative characteristics, and patient-reported outcomes (PROs) were obtained. PROs of PROMIS Physical Function (PROMIS-PF), PROMIS Anxiety (PROMIS-A), PROMIS Pain Interference (PROMIS-PI), PROMIS Sleep Disturbance (PROMIS-SD), Patient Health Questionnaire-9 (PHQ-9), Visual Analog Scale (VAS) Back Pain (VAS-BP), VAS Leg Pain (VAS-LP), and Oswestry Disability Index (ODI) were collected at preoperative and up to 2-year postoperative time points. Minimum clinically important difference (MCID) achievement was determined through comparison of previously established values. Comparison between cohorts were determined through inferential statistics.

RESULTS

A total of 473 patients were identified, with stratification of 125 patients in the normal cohort, 161 in the overweight cohort, 101 in the obese I cohort, and 87 in the obese II-III cohort. Mean postoperative follow-up time was 13.51 ± 8.72 months. Higher BMI patients had higher operative times, longer postoperative length of stay, and greater narcotic consumption (p ≤ 0.001, all). Patients with higher BMI (obese I, obese II-III) reported inferior preoperative PROMIS-PF, VAS-BP, and ODI scores (p ≤ 0.003, all). Postoperatively, obese I-III cohorts demonstrated inferior PROMIS-PF, PHQ-9, VAS-BP, and ODI scores at final follow-up (p ≤ 0.016, all). However, patients demonstrated similar postoperative changes and MCID achievement regardless of preoperative BMI.

CONCLUSION

Patients undergoing lumbar decompression demonstrated similar postoperative improvement in physical function, anxiety, pain interference, sleep disturbance, mental health, pain, and disability outcomes independent of preoperative BMI. However, obese patients reported worse physical function, mental health, back pain, and disability outcomes at final postoperative follow-up. Patients with greater BMI undergoing lumbar decompression demonstrate inferior postoperative clinical outcomes.

Does Symptom Duration Prior to ACDF for Disc Herniation Influence Patient-Reported Outcomes in a Workers' Compensation Population?

OBJECTIVE

To evaluate the influence of symptom duration (SD) prior to ACDF on patient-reported outcomes (PROs) in WC patients.

METHODS

A prospective registry was searched for WC patients who underwent ACDF for herniated disc(s). Two cohorts were formed: Lesser Duration (LD; SD<6 months) and Prolonged Duration (PD; SD≥6 months). PROs were collected preoperatively and at 6-weeks/12-weeks/6-months/1-year postoperatively. PROs were compared within and between groups. Rates of MCID were compared between groups.

RESULTS

63 patients were included. The LD cohort reported improvement in PROMIS-PF/NDI/VAS neck at 12-weeks/6-months, and VAS arm at all periods (p≤0.036, all). The LD cohort reported improvement in NDI at 12-weeks/6-months and VAS arm at 6-weeks/12-weeks/6-months (p≤0.037, all). Between groups, the LD cohort demonstrated superior scores in PROMIS-PF at 6-weeks/12-weeks/6-months, NDI preoperatively and at 6-weeks/12-weeks/6-months, VAS neck at 12-weeks, and PHQ-9 at 6-months (p≤0.045, all). The LD group was more likely to achieve MCID in PROMIS-PF at 12-weeks (p=0.012). The PD group was more likely to achieve MCID in PHQ-9 at 6-months (p=0.023).

CONCLUSION

Despite length of symptom duration prior to ACDF in WC patients, patients demonstrated improvements in disability and arm pain. Patients with a lesser SD also demonstrated improvements in physical function and neck pain. Patients with a lesser SD demonstrated superior scores in physical function, pain, disability, and mental health and were more likely to achieve clinically significant improvement in physical function. Patients with a greater symptom duration SD were more likely to achieve clinically significant improvement in mental health.

Influence of Preoperative Disability on Clinical Outcomes in Patients Undergoing Anterior Lumbar Interbody Fusion

BACKGROUND

Few studies have examined the influence of preoperative disability through the Oswestry Disability Index (ODI) on clinical outcomes in patients undergoing anterior lumbar interbody fusion (ALIF).

METHODS

Patients undergoing ALIF were separated into 2 groups based on ODI<41 (lower disability) versus ODI≥41% (higher disability). Patient-reported outcomes (PROs) were collected at preoperative and postoperative 6-week/12-week/6-month/1-year/2-year time points. Physical function PROs were Patient-Reported Outcomes Measurement Information System Physical Function and 12-item Short Form Physical Component Score. Mental function PROs were 12-item Short Form Mental Component Score and Patient Health Questionnaire-9. Pain PROs were visual analog scale back and visual analog scale leg. ODI was the disability PRO.

RESULTS

A total of 148 patients were identified, with 52 patients with lower disability. Higher disability patients demonstrated significant improvement in mental function (P ≤ 0.010, all). Lower disability patients demonstrated superior postoperative PROs in physical function, mental function, back pain, and disability outcomes (P ≤ 0.034, all). Minimum clinically important difference achievement rates for lower disability patients were higher for back pain and lower for mental function and disability outcomes (P ≤ 0.041, all).

CONCLUSIONS

Independent of preoperative disability, patients undergoing ALIF reported significant postoperative improvement in physical function, pain, and disability outcomes. Patients with lower preoperative disability continued to report superior PROs in mental function, back pain, and disability postoperatively. Minimum clinically important difference achievement rates for lower disability patients were higher for back pain and lower in mental function and disability outcomes. Patients undergoing ALIF with higher preoperative disability may experience greater clinically meaningful improvement in mental function and disability.

The Influence of Presenting Physical Function on Postoperative Patient Satisfaction and Clinical Outcomes Following Minimally Invasive Lumbar Decompression

STUDY DESIGN

The study of retrospective cohort.

OBJECTIVE

The aim was to compare patient-reported outcome measures (PROMs), satisfaction, and minimum clinically important difference (MCID) achievement following minimally invasive lumbar decompression (MIS-LD) in patients stratified by the preoperative patient-reported outcomes measurement information system physical function (PROMIS-PF) score.

SUMMARY OF BACKGROUND DATA

Although prior studies have assessed the predictive utility of preoperative PROMIS-PF scores on patient outcomes in spinal fusion, its utility has not been studied for patients undergoing MIS-LD.

METHODS

Primary, single/multilevel MIS-LD procedures were identified. PROMs were administered at preoperative/6-week/12-week/6-month/1-year/2-year time points and included PROMIS-PF/visual analog scale (VAS) back and leg/Oswestry Disability Index (ODI). Satisfaction scores were collected postoperatively. The patients were grouped by preoperative PROMIS-PF score (≤35, >35), with higher scores indicating improved physical function. Demographic/perioperative characteristics were compared using χ 2 /Student t test. Mean PROMs/postoperative satisfaction was compared utilizing 2-sample t test. Postoperative PROM improvement from preoperative was calculated with paired t tests. MCID achievement rates were compared using simple logistic regression.

RESULTS

Two hundred and sixteen patients were included, 58 PROMIS-PF≤35 and 158 PROMIS-PF>35. Ethnicity/insurance differed ( P ≤0.004, all). Hospital length of stay was greater for PROMIS-PF>35 ( P =0.042). All preoperative mean PROMs significantly differed except for VAS Back. Several postoperative mean PROMs differed: PROMIS-PF at 6 weeks/12 weeks/6 months/1 year, SF-12 PCS at 6 weeks/12 weeks/1 year, VAS Back at 6 weeks/12 weeks, VAS leg at 6 weeks/12 weeks, and ODI at 6 weeks/12 weeks ( P <0.050, all). All PROMs significantly improved from preoperative at all postoperative time points ( P <0.003, all). The MCID achievement rates differed only for VAS back for 6 weeks, favoring PROMIS-PF>35 cohort ( P =0.001). Postoperative satisfaction was greater in PROMIS-PF>35 cohort for VAS leg at 6 weeks/12 weeks/6 months/2 years, VAS back at 6-weeks/12-weeks, and ODI at all time points ( P <0.037, all). Postoperative satisfaction was greater in PROMIS-PF>35 cohort for individual ODI categories: sleep at 6-weeks/12-weeks/1-year/2-years, lifting, walking, standing, and travel at all time points, and sexual at 6-weeks/12-weeks/1-year/2-years ( P <0.030, all).

CONCLUSION

Poorer preoperative PROMIS-PF scores were associated with worse postoperative clinical outcomes and satisfaction. By stratifying patients with preoperative PROMIS-PF scores, surgeons may better predict postoperative clinical improvement and seek to manage patient expectations.

Validation of Neck Disability Index Severity among Patients Receiving One or Two-Level Anterior Cervical Surgery

STUDY DESIGN

Retrospective cohort.

PURPOSE

To evaluate the validity of established severity thresholds for Neck Disability Index (NDI) among patients undergoing anterior cervical discectomy and fusion (ACDF) or cervical disc arthroplasty (CDA).

OVERVIEW OF LITERATURE

Few studies have examined the validity of established NDI threshold values among patients undergoing ACDF or CDA.

METHODS

A surgical database was reviewed to identify patients undergoing cervical spine procedures. Demographics, operative characteristics, comorbidities, NDI, Visual Analog Scale (VAS), and 12-item Short Form (SF-12) physical and mental composite scores (PCS and MCS) were recorded. NDI severity was categorized using previously established threshold values. Improvement from preoperative scores at each postoperative timepoint and convergent validity of NDI was evaluated. Discriminant validity of NDI was evaluated against VAS neck and arm and SF-12 PCS and MCS.

RESULTS

All 290 patients included in the study demonstrated significant improvements from baseline values for all patient-reported outcome measures (PROMs) at all postoperative timepoints (p<0.001) except SF-12 MCS at 2 years (p =0.393). NDI showed a moderate- to-strong correlation (r≥0.419) at most timepoints for VAS neck, VAS arm, SF-12 PCS, and SF-12 MCS (p<0.001, all). NDI severity categories demonstrated significant differences in mean VAS neck, VAS arm, SF-12 PCS, and SF-12 MCS at all timepoints (p<0.001, all). Differences between NDI severity groups were not uniform for all PROMs. VAS neck values demonstrated significant intergroup differences at most timepoints, whereas SF-12 MCS showed significantly different values between most severity groups.

CONCLUSIONS

Neck disability is strongly correlated with neck and arm pain, physical function, and mental health and demonstrates worse outcomes with increasing severity. Previously established severity categories may be more applicable to pain than physical function or mental health and may be more uniformly applied preoperatively for cervical spine patients.

Does Baseline Mental Health Influence Outcomes among Workers' Compensation Claimants Undergoing Minimally Invasive Transforaminal Lumbar Interbody Fusion?

STUDY DESIGN

This was a retrospective cohort study.

PURPOSE

This study investigated the influence of preoperative mental health on patient-reported outcome measures (PROMs) and minimal clinically important difference (MCID) among workers' compensation (WC) recipients undergoing minimally invasive transforaminal lumbar interbody fusion (MIS TLIF).

OVERVIEW OF LITERATURE

No studies have evaluated the impact of preoperative mental functioning on outcomes following MIS TLIF among WC claimants.

METHODS

WC recipients undergoing single-level MIS TLIF were identified. PROMs of Visual Analog Scale (VAS) for back and leg pain, Oswestry Disability Index (ODI), 12-item Short Form Physical and Mental Composite Scale (SF-12 PCS/MCS), and Patient-Reported Outcomes Measurement Information System Physical Function evaluated subjects preoperatively/postoperatively. Subjects were grouped according to preoperative SF-12 MCS: <41 vs. ≥41. Demographic/perioperative variables, PROMs, and MCID were compared using inferential statistics. Multiple regression was used to account for differences in spinal pathology.

RESULTS

The SF-12 MCS <41 and SF-12 MCS ≥41 groups included 48 and 45 patients, respectively. Significant differences in ΔPROMs were observed at SF-12 MCS at all timepoints, except at 6 months (p≤0.041, all). The SF-12 MCS <41 group had worse preoperative to 6-months SF-12 MCS, 12-weeks/6-months VAS back, 12-week VAS leg, and preoperative to 6-months ODI (p≤0.029, all). The SF-12 MCS <41 group had greater MCID achievement for overall ODI and 6-weeks/1-year/overall SF-12 MCS (p≤0.043, all); the SF-12 MCS ≥41 group had greater attainment for 6-month VAS back (p=0.004).

CONCLUSIONS

Poorer mental functioning adversely affected the baseline and intermediate postoperative quality-of-life outcomes pertaining to mental health, back pain, and disability among WC recipients undergoing lumbar fusion. However, outcomes did not differ 1-2 years after surgery. While MCID achievement for pain and physical function was largely unaffected by preoperative mental health score, WC recipients with poorer baseline mental health demonstrated higher rates of overall clinically meaningful improvements for disability and mental health.

Establishing minimum clinically important difference for patient-reported outcome measures in patients undergoing lateral lumbar interbody fusion

BACKGROUND

The minimum clinically important difference (MCID) has not been established in lateral lumbar interbody fusion (LLIF). Our study aims to establish MCID for patient-reported outcome measures (PROMs) of physical function and pain for LLIF through anchor-based and distribution-based approaches.

METHODS

Patients undergoing LLIF with preoperative and 6-month postoperative Oswestry Disability Index (ODI) scores were identified. PROMs of Patient-Reported Outcome Measurement Information System Physical Function (PROMIS-PF), 12-Item Short Form Physical Component Score (SF-12 PCS), Veterans RAND 12-Item Short Form Physical Component Score (VR-12 PCS), visual analog scale (VAS) back, and VAS leg were collected at preoperative and 6-month postoperative time points. Anchor-based MCID calculations were average change, minimal detectable change, change difference, receiver operating characteristic curve, and cross-sectional analysis using ODI as the anchor. Distribution-based calculations were standard error of measurement, reliable change index, effect size, and 0.5 ∗ ΔSD.

RESULTS

Fifty patients were included. Anchor-based approaches MCID ranges were PROMIS-PF 1.1-9.6, SF-12 PCS 6.4-16.5, VR-12 PCS 5.9-12.9, VAS Back 1.4-4.6, and VAS Leg 1.3-4.3. The area under curve for receiver operating characteristics (ROC) analysis ranged from 0.63 to 0.71. Distribution-based MCID ranges were PROMIS-PF 1.4-4.5, SF-12 PCS 1.9-12.7, VR-12 PCS 2.0-6.6, VAS Back 0.4-1.4, and VAS Leg 0.5-2.0.

CONCLUSION

MCID thresholds varied widely depending on the calculation method. The closest to (0,1) ROC approach was the most clinically appropriate MCID calculation. The corresponding MCID values for LLIF were PROMIS-PF at 7.8, SF-12 PCS at 6.4, VR-12 PCS at 9.3, VAS Back at 4.6, and VAS Leg at 4.3.

Impact of Sleep Disturbance on Clinical Outcomes in Lumbar Decompression

OBJECTIVE

To examine the impact of Patient-Reported Outcomes Measurement Information System (PROMIS) Sleep Disturbance (PROMIS-SD) on clinical outcomes in patients undergoing lumbar decompression.

METHODS

Patients undergoing lumbar decompression with preoperative PROMIS-SD scores were retrospectively included. Patients were separated into 2 cohorts: none to slight sleep disturbance (PROMIS-SD <55) and mild to severe sleep disturbance (PROMIS-SD ≥55). Patient-reported outcome measures including PROMIS Physical Function, PROMIS Anxiety, PROMIS Pain Interference, PROMIS SD, 9-item Patient Health Questionnaire, visual analog scale back/leg, and Oswestry Disability Index were collected preoperatively and up to 1 year postoperatively.

RESULTS

Of 87 patients identified, 48 patients had PROMIS-SD scores ≥55. Regardless of preoperative PROMIS-SD score, patients reported significant improvement in physical function, anxiety, pain interference, depression, pain, and disability outcomes in at least 1 time point. Patients in the PROMIS-SD ≥55 cohort reported postoperative improvement in sleep disturbance. Patients in the PROMIS-SD <55 cohort reported superior preoperative patient-reported outcome measures in all domains and superior postoperative improvement in pain interference and sleep disturbance. Minimum clinically important difference attainment rates were higher in the PROMIS-SD ≥55 cohort in physical function, anxiety, pain interference, sleep disturbance, and pain.

CONCLUSIONS

Patients undergoing lumbar decompression demonstrated significant postoperative improvement in most clinical outcomes regardless of preoperative sleep disturbance. Patients with mild to severe sleep disturbance had higher minimum clinically important difference attainment rates for physical function, mental function, and pain. Patients undergoing lumbar decompression with greater preoperative sleep disturbance may experience more clinically noticeable improvement.

Pain Interference Influence on Postoperative Clinical Trajectory in Patients Undergoing Lumbar Decompression

OBJECTIVE

Newer Patient-Reported Outcomes (PROs) may offer benefits over legacy PROs in ease of administration and interpretation. We aim to study the influence of preoperative pain interference (PI) using the Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Interference (PROMIS-PI) on postoperative clinical outcomes in patients undergoing lumbar decompression.

METHODS

Patients undergoing lumbar decompression without fusion were separated into 2 cohorts: PROMIS-PI < 64 (lesser PI) and PROMIS-PI ≥ 64 (greater PI). PROs included PROMIS physical function, PROMIS anxiety (PROMIS-A), PROMIS sleep disturbance (PROMIS-SD), PROMIS-PI, Patient Health Questionnaire-9, Visual Analog Scale (VAS) back, VAS leg, and Oswestry Disability Index (ODI) and were collected at preoperative and postoperative time points. Demographics, perioperative characteristics, PROs, and Minimum Clinically Important Difference (MCID) were compared among groups through non-parametric inferential statistics.

RESULTS

One-hundred and seven patients were identified. Independent of preoperative PI, patients reported significant postoperative improvement in PROMIS physical function, PROMIS-A, PROMIS-PI, VAS back, VAS leg, and ODI. The greater PI cohort reported significant postoperative improvement in Patient Health Questionnaire-9 and PROMIS-SD. The lesser PI cohort reported superior preoperative PROs in all domains. Postoperatively, the lesser PI cohort reported superior 6-week PROMIS-A and PROMIS-SD. MCID achievement rates were higher in the greater PI cohort for PROMIS-PI, VAS back, VAS leg, and ODI.

CONCLUSIONS

Patients with lower preoperative PI reported superior postoperative anxiety and sleep disturbance. Patients with greater preoperative PI had higher MCID achievement rates in PI, pain, and disability. Patients with greater preoperative PI undergoing lumbar decompression may demonstrate higher rates of clinically tangible improvement.

Impact of preoperative symptom duration in patients undergoing lateral lumbar interbody fusion

BACKGROUND

Few studies have examined the influence of preoperative symptom duration on clinical outcomes in patients undergoing lateral lumbar interbody fusion (LLIF) for degenerative conditions.

METHODS

Patients undergoing LLIF presenting with radiculopathy and/or neurogenic claudication were separated into two groups: preoperative symptom duration < 1-year (shorter duration) versus duration ≥ 1-year (longer duration). Patients undergoing surgery for trauma/malignancy/infection were excluded. Patient-reported outcome measures (PROMs) of Patient-Reported Outcomes Measurement Information System-Physical Function (PROMIS-PF), 12-Item Short Form Physical/Mental Component Score (SF-12 PCS/MCS), Patient Health Questionnaire-9 (PHQ-9), visual analog scale (VAS) back/leg, and Oswestry Disability Index (ODI) were collected at preoperative and postoperative time points.

RESULTS

Eighty-two total patients, with 34 shorter-duration patients, were identified after propensity score matching for demographics. Longer-duration patients had higher estimated blood loss. All patients reported significant improvement in physical function, mental function, pain, and disability in at least one postoperative time point, except for SF-12 MCS in the shorter duration cohort. The longer duration cohort had higher MCID achievement in 12-week VAS back.

CONCLUSION

Patients undergoing LLIF demonstrated significant postoperative improvement in physical function, mental function, pain, and disability outcomes independent of preoperative symptom duration. Both cohorts, when compared by preoperative symptom duration, demonstrated similar postoperative PROM scores. Patients with longer preoperative symptom duration had higher 12-week leg pain MCID achievement. These findings suggest that delayed time to surgery may not lead to inferior clinical outcomes in patients undergoing LLIF for degenerative conditions.

Impact of Postoperative Length of Stay on Patient-Reported and Clinical Outcomes After Anterior Lumbar Interbody Fusion

BACKGROUND

Existing literature has not yet evaluated the impact of postoperative length of stay (LOS) on patient-reported outcome measures (PROMs) and minimum clinically important difference (MCID) in patients undergoing anterior lumbar interbody fusion (ALIF). The authors investigates the influence of postoperative LOS following ALIF on PROMs and MCID achievement rates.

METHODS

A single-surgeon database was retrospectively reviewed for patients undergoing single-level ALIF. The following 2 cohorts were studied: patients with LOS <45 hours and patients with LOS ≥45 hours. The following PROMs were recorded at preoperative and 6-week, 12-week, 6-month, 1-year, and 2-year postoperative timepoints: visual analog scale (VAS) back and leg, Oswestry Disability Index (ODI), 12-item short form (SF-12) physical composite score (PCS), and patient-reported outcome measurement information system physical function. MCID achievement was compared by LOS grouping using χ ² analysis. The rates of complications by LOS grouping and the relative risk among demographic and perioperative characteristics for a longer hospital stay of ≥45 hours were calculated.

RESULTS

A total of 52 subjects were included in each cohort. LOS ≥45 hours demonstrated worse ODI at 6 weeks and SF-12 PCS preoperative and at 12 weeks (P ≤ 0.026, all). LOS <45 hours demonstrated greater MCID rates for all PROMs except VAS back (P ≤ 0.004, all). Postoperative urinary retention (POUR), fever, and total complications (P ≤ 0.003, all) were associated with increased LOS. Diabetes (P = 0.037), preoperative VAS neck ≥7 (P = 0.012), and American Society of Anesthesiologists classification ≥2 (P = 0.003) served as preoperative risk factors for postoperative stay ≥45 hours.

CONCLUSION

Following single-level ALIF, patients with shorter LOS demonstrated significantly greater overall MCID achievement for most PROMs. POUR, fever, and total complications were associated with longer LOS and greater blood loss. Diabetes and higher preoperative leg pain were identified as risk factors for longer LOS.

CLINICAL RELEVANCE

Patients undergoing ALIF with shorter LOS had greater MCID achievement for disability, physical function, and leg pain outcomes. Patients with greater preoperative leg pain and diabetes may be at risk for longer LOS.

LEVEL OF EVIDENCE: 3

Multimodal analgesic protocol for cervical disc replacement in the ambulatory setting: Clinical case series

Background

Effective pain management is paramount for outpatient surgical success. This study aims to report a case series of patients undergoing cervical disc replacement (CDR) in an ambulatory surgery center (ASC) with the use of an enhanced multimodal analgesic (MMA) protocol.

Methods

Primary, single-/2-level CDR procedures at an ASC with an enhanced MMA protocol were included. ASC patients were discharged day of surgery. Patient-reported outcome measures (PROMs) were administered at preoperative/6-week/12-week/6-month/1-year/2-year timepoints and included Visual Analogue Scale (VAS) neck, VAS arm, Neck Disability Index (NDI), Patient-Reported Outcomes Measurement Information System-Physical Function (PROMIS-PF), and 12-Item Short-Form Physical and Mental Composite Score (SF-12 PCS/SF-12 MCS). A t-test assessed postoperative PROM improvement from baseline. MCID achievement was determined by comparing ΔPROM scores to previously established thresholds.

Results

106 patients were included, 76 single-level and 30 2-level. Most single-levels occurred at C5-C6, most 2-levels at C5-C7. One 2-level patient developed a hematoma 5 days postoperatively and underwent revision for evacuation. Five patients reported postoperative dysphagia; all were quickly resolved. One patient had an episode of seizure secondary to serotonin syndrome from concealed drug use. Patient was reintubated, transferred, and treated for serotonin syndrome. Two patients experienced postoperative nausea/vomiting. Cohort significantly improved from baseline for all PROMS at all timepoints except SF-12 MCS at 1-year/2-years and SF-12 PCS at 2 years (p < 0.047, all). Overall MCID achievement rates were: VAS arm (48.7%), VAS neck (69.1%), NDI (98.9%), SF-12 MCS (50.0%), SF-12 PCS (54.6%), and PROMIS-PF (73.4%).

Conclusion

Outpatient CDR, incorporating an enhanced MMA protocol, can be safely and effectively performed with proper patient selection and surgical technique. Patients saw timely discharge, well-controlled postoperative pain, and favorable long-term outcomes.

Seasonal variation in diagnosis of cutaneous invasive melanoma and cutaneous squamous cell carcinoma: A nationwide study in the Netherlands

BACKGROUND

Currently, there is no study that has reported on the seasonal trends of skin cancer in the Netherlands. This study aimed to investigate seasonal variation in diagnosis of cutaneous melanoma (CM) and cutaneous squamous cell carcinoma (cSCC) focusing on different subgroups.

METHODS

CM diagnosed from 2001 till 2019 and cSCCs from 2001 till 2015 were selected from the Netherlands Cancer Registry. The monthly distribution of CM and cSCC diagnoses were evaluated. Summer-to-winter ratios (SWRs) were calculated overall and stratified by patient and tumour characteristics.

RESULTS

Significant increases in melanoma incidence were noted over the summer months (SWR 1.39 (CI 1.37-1.40)). This increase was less apparent for cSCCs, as higher incidence rates were observed in the months September-November (SWR 1.13 (CI 1.12-1.14)). The seasonal variation of CM was greater in women and younger people, in superficial spreading melanoma and lentigo maligna melanoma, for the extremities, in thinner lesions, and for stage I at diagnosis. The seasonal variation of cSCC was similar for both sexes, most marked in patients 45-69 and ≥ 70, and for the extremities.

CONCLUSIONS

Our findings showed a pronounced seasonal variation in the diagnosis of CM with a peak in the summer months. For cSCC, no evident peak was observed, but an increase in diagnosis was noted in fall. Both CM and cSCC showed strong seasonal effects for the extremities.

Impact of Gender on Postsurgical Outcomes in Patients Undergoing Anterior Cervical Discectomy and Fusion

BACKGROUND

Prior studies associate male gender with higher complication rates following anterior cervical discectomy and fusion (ACDF), but none has investigated gender influence on patient-reported outcome measures (PROMs) and minimal clinically important difference (MCID) following single-level ACDF.

METHODS

Patients undergoing primary, single-level ACDF were divided into female and male groups. Visual analog scale (VAS) neck/arm, Neck Disability Index (NDI), 12-item short form (SF-12) physical composite score (PCS), PROM information system physical function (PROMIS-PF), and veterans RAND 12-item (VR-12) health survey PCS were collected preoperatively and postoperatively. Simple linear regression analysis evaluated the predictive capability of gender on PROMs. Multiple regression analysis was performed to determine the effects of gender on mean PROMs while accounting for insurance type. Established MCID values determined achievement rates across PROMs. χ ² analysis compared MCID achievement by gender.

RESULTS

A total of 179 women and 134 men were included. Cohorts differed in insurance type, length of stay, and discharge day (P ≤ 0.017, all). Women improved in PROMs at all timepoints (P ≤ 0.049, all) except SF-12 PCS 6 weeks and PROMIS-PF 6 weeks. Men improved in PROMs at all timepoints (P ≤ 0.042) except VAS arm 2 years, SF-12 PCS 6 weeks and 2 years, PROMIS-PF 6 weeks, and VR-12 PCS 6 weeks. Women demonstrated higher SF-12 PCS (P = 0.043) and VR-12 PCS (P = 0.035) 2 years. Multiple regression determined that VAS neck and arm from 6 weeks to 6 months, NDI from preoperative to 6 months, SF-12 PCS and VR-12 PCS from preoperative to 12 weeks, and PROMIS-PF preoperative, 6 weeks, and 6 months were significantly affected by gender and insurance status (P ≤ 0.031, all). MCID achievement rate did not differ for any PROM between genders.

CONCLUSION

Women reported significantly higher long-term physical function health (SF-12 PCS and VR-12 PCS) compared with men, while disability and pain did not differ. Nevertheless, no significant differences in MCID achievement were observed for any PROM studied. Gender does not appear to play a significant role in clinically meaningful recovery following single-level ACDF.

CLINICAL RELEVANCE

Gender has little value in prognostication for determining clinically meaningful recovery after single-level ACDF.

LEVEL OF EVIDENCE: 3

Minimally Invasive Transforaminal versus Anterior Lumbar Interbody Fusion in Patients Undergoing Revision Fusion: Clinical Outcome Comparison

OBJECTIVE

We aim to compare perioperative/postoperative clinical outcomes between minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) and anterior lumbar interbody fusion (ALIF) in patients presenting for revision surgery.

METHODS

A retrospective database was reviewed for procedures between November 2005 and December 2021. Revision MIS-TLIF/ALIFs were included, whereas primary fusions or diagnosis of infection/malignancy/trauma were excluded. Patients were grouped into MIS-TLIF/ALIF cohorts. Preoperatively/postoperatively collected patient-reported outcome measures (PROMs) included visual analog scale back/leg score, Oswestry Disability Index, Patient-Reported Outcome Measurement Information System-Physical Function (PROMIS-PF), and Short-Form 12-Item Survey Mental/Physical Composite Scores.

RESULTS

A total of 164 patients were eligible, with 84 patients in the MIS-TLIF cohort. The presence of degenerative spondylolisthesis and central stenosis, narcotic consumption on postoperative day 0/1, and postoperative urinary retention rates was greater in the MIS-TLIF cohort (P ≤ 0.036, all). Preoperative PROMs between cohorts did not significantly differ. Significantly favorable postoperative PROM scores were shown in the MIS-TLIF cohort with PROMIS-PF at 12 weeks/6 months (P ≤ 0.033, all). Most patients in both cohorts achieved overall minimum clinically important difference for visual analog scale back/leg score, Oswestry Disability Index, Short-Form 12-Item Survey Physical Composite Score, and PROMIS-PF. No differences were noted between cohorts within rates of MCID achievement.

CONCLUSIONS

Patients undergoing revision fusion via MIS-TLIF or ALIF reported similar 1-year postoperative mean outcomes and rates of meaningful clinical achievement for physical function, mental health, disability, and back/leg pain. However, patients undergoing revision MIS-TLIF reported improved physical function at 12 weeks and 6 months. Perioperatively, patients undergoing revision MIS-TLIF were noted to consume significantly greater quantities of narcotics.

Impact of age within younger populations on outcomes following cervical surgery in the ambulatory setting

Objective

To determine the effect of age within the younger population seen at ambulatory surgical centers on patient-reported outcome measures (PROMs) after cervical spine surgery.

Methods

Patients of age <65 years undergoing single-level anterior cervical discectomy and fusion (ACDF) or cervical disc replacement (CDR) were included. Patients were divided by mean age of initial population (46 years). PROMs included Patient-reported Outcome Measurement Information System Physical Function (PROMIS-PF), 12-Item Short-Form Physical Component Survey (SF-12 PCS), Visual Analog Scale (VAS) neck, VAS arm, Neck Disability Index (NDI) collected preoperatively and at postoperative time points up to 2 years.

Results

138 patients were included, with 66 patients <46 years. Both cohorts demonstrated improvement from preoperative baseline with regard to all studied PROMs at multiple time points postoperatively (p ≤ 0.042, all). Between groups, the older cohort demonstrated greater mean PROMIS-PF scores preoperatively and at 6 weeks (p ≤ 0.011, both), while VAS arm scores were lower in the older group at 1 year (p = 0.002), and NDI scores were lower in the older group at 6 weeks and 1 year (p < 0.027, both). Minimal Clinically Important Difference (MCID) achievement rates were greater in the younger group in PROMIS PF at 2 years (p = 0.002), and in the older group in VAS arm score at 1 year (p = 0.007).

Conclusion

Both cohorts showed significant improvement at multiple postoperative time points for all PROMs. Between groups, the older group reported more favorable physical function, VAS arm, and NDI scores at several time points. However, MCID achievement rates only significantly differed in two PROMs at singular time points. Difference in age in patients <65 years likely does not significantly affect long-term outcomes after cervical spine surgery.

Influence of Preoperative Depressive Burden on Achieving a Minimal Clinically Important Difference Following Lumbar Decompression

STUDY DESIGN

This was a retrospective cohort study.

OBJECTIVE

This study evaluates the association of preoperative mental health with the rate of achieving minimal clinically important difference (MCID) in patient-reported outcomes following lumbar decompression (LD).

SUMMARY OF BACKGROUND DATA

Research is scarce regarding the influence of preoperative depression on the rate of achieving MCID for mental health, physical function, and pain among LD patients.

METHODS

A surgical registry was retrospectively reviewed for primary LD surgeries. Patients were grouped by depressive symptom severity according to the preoperative Patient Health Questionnaire 9 score. The association of Patient Health Questionnaire 9 subgroups with demographic and surgical variables was analyzed, and differences among subgroups were assessed. Achievement rates of MCID for physical function, pain, disability, and mental health were compared among groups at each time point using previously established MCID thresholds.

RESULTS

Of the 321 subjects, 69.8% were male, and 170 subjects had minimal preoperative depressive symptoms, 86 had moderate, and 65 had severe. Patients in moderate and severe groups demonstrated a significantly greater rate of MCID achievement for disability at 6 weeks and 3 months postoperatively. The severe group demonstrated a significantly higher rate of achieving MCID for mental health at the 1-year time point.

CONCLUSIONS

Patients with any range of preoperative depressive symptom severity had a similar rate of achieving MCID for pain and physical function throughout 1 year following LD. The severe depressive symptom group had a higher rate of MCID achievement with disability at 6 weeks and with mental health at 1 year. This study demonstrates that patients with any preoperative depressive symptom severity have an indistinguishable ability to attain MCID by 1 year following LD.

LEVEL OF EVIDENCE

Level III.