Disease-specific pain measures for osteoarthritis of the knee or hip

Dynamic weight-bearing assessment of pain in knee osteoarthritis: a reliability and agreement study

PURPOSE

To evaluate the reliability, agreement and smallest detectable change in a measurement instrument for pain and function in knee osteoarthritis; the Dynamic weight-bearing Assessment of Pain (DAP).

METHODS

The sample size was set to 20 persons, recruited from the outpatient osteoarthritis clinic at Frederiksberg Hospital, Copenhagen. Two physiotherapists tested all participants during two visits; at the first visit, one single DAP (including four scores) was conducted by rater one; at the second visit, DAP was conducted by both raters one and two in randomized order with concealed allocation. The time interval was approximately 1.5 h. Measurement error was estimated by standard error of measurement (SEM). The intra- and inter-rater reliability was estimated by Intra-class Correlation Coefficients for agreement based on a two-way ANOVA with random effects (single measures ICC 2.1). Smallest detectable change (SDC) and limits of agreement were calculated.

RESULTS

The pain score showed excellent reliability in terms of ICC (intra-rater 0.93, CI 0.83-0.97, inter-rater 0.91, CI 0.78-0.96), low SEM (intra-rater 0.70, inter-rater 0.86, on a scale from 0 to 10), and acceptable SDC for intra-rater test (1.95). The three knee bend scores all had ICC above 0.50, showing fair-to-good reliability. None of the knee bend scores showed acceptable SEM and SDC.

CONCLUSIONS

The reproducibility of the DAP pain score meets the demands for use in clinical practice and research. The total knee bend could be useful for motivational purpose in clinical use. Testing of other psychometric properties of the DAP is pending.

Schooling of the patients and clinical application of questionnaires in osteoarthitis

OBJECTIVE

To evaluate the consistency of the questionnaires (WOMAC, Lequesne, VAS, SF 36-PCS and SF 36-MCS) when applied in patients with osteoarthritis of the knees (KOA) verifying if age and level of education interfere with the completion of the questionnaires.

METHOD

One hundred and two patients with KOA answered WOMAC, LESQUESNE, VAS and SF-36 questionnaires and provided data correlated with age and education. The internal consistency of the WOMAC questionnaire was verified with Cronbach's alpha. Pearson's correlations between the questionnaires, age and educational level was performed.

RESULTS

Mean age was 65 years old. Schooling averaged 7.94 years; WOMAC 47.95; VAS 63.57; Lequesne 12.29; PCS and MCS 31.91 43.68. Cronbach's alpha for WOMAC 0.9. Education did not affect WOMAC response (r=-0.182, p = 0.067) and MCS (r=0.021 / p=0.835), but showed weak but significant correlation with VAS (r=-0.264 / p=0.007), Lequesne (r=0.277, p=0.005) and PCS (r=0.309/ p=0.002). Age showed significant direct correlation only with PCS (r=0.205, p=0.039).

CONCLUSION

The level of education does not interfere with the completion of WOMAC but may interfere with completing VAS, Lequesne and physical component of SF-36. Level of Evidence II, Retrospective Study.

Evaluation of outcome measures for use in clinical practice for adults with musculoskeletal conditions of the knee: a systematic review

BACKGROUND

This systematic review reported on the clinimetric properties of outcome measures for use in clinical practice for adults with musculoskeletal conditions of the knee.

METHODS

A systematic search was performed in Medline, EMBASE, Cinahl and AMED to identify studies examining the clinimetric properties of outcome measures for adults undergoing conservative treatment of ligament injuries, meniscal lesions, patellofemoral pain and osteoarthritis of the knee. Outcomes measures taking less than 20 min to administer and requiring minimal equipment and space were included. Pairs of authors used a checklist to record the characteristics of the outcome measures, their reported clinimetric properties and the demographics of the study populations. The OMERACT filters of 'truth' and 'discrimination' were applied to the data for each outcome measure by an expert panel.

RESULTS

Forty-seven studies were included evaluating 37 outcome measures. Ten outcome measures had adequate supporting evidence for 'truth' and 'discrimination': AAOS, AKPS, goniometer measurement, IKDC, KOOS, LEFS, Lysholm, Tegner, WOMAC and WOMET. However none of the outcome measures had been comprehensively tested across all clinimetric properties.

CONCLUSION

Despite the widespread use of some outcome measures in clinical practice and primary research, data on the clinimetric properties were available for only 37 and of these only 10 had adequate supporting evidence for use in this population. However, before a core set of outcome measures can be recommended use in clinical practice, for adults with musculoskeletal conditions of the knee, consensus should be obtained on 'feasibility' in terms of burden on the clinician and the participant.

Older Adults’ Ways of Dealing With Daily Life While Living With Long-Term Musculoskeletal Pain at Home

Long-term musculoskeletal pain is a global health problem among older adults. Yet little is known about how these older adults actually deal with daily life. This study’s aim is to describe the ways these older adults dealt with daily life at home. Phenomenography is used to collect and analyze data from semistructured interviews with 19 older adults and to identify the range in which they dealt with daily life. Findings consist of an outcome space that encompassed four categories: ignore, struggle, adjust, and resign. The different ways older adults dealt with daily life when living with long-term pain at home strengthen the importance of individualized plans of care in the home and a holistic perspective. Findings contribute to enhanced understanding of a common health problem among older adults that can be used to promote quality of care and improve the quality of life of older adults.

Using an osteoarthritis-specific pain measure in elders with cognitive impairment: a pilot study

AIM AND BACKGROUND

The Western Ontario and McMaster Osteoarthritis Index pain scale has not been used with cognitively impaired elders to measure their knee or hip pain. This study therefore examined the usefulness of the Western Ontario and McMaster Osteoarthritis Index pain scale for measuring pain in this population.

METHOD

Fourteen cognitively impaired elders with osteoarthritis of the knee or hip participated in the study. Elders' pain was assessed with the Western Ontario and McMaster Osteoarthritis Index pain scale, the Verbal Descriptor Scale and the Present Pain Intensity Scale, twice 5 minutes apart. Proxy report of pain was provided by the nursing staff.

RESULTS

The correlations among the Western Ontario and McMaster Osteoarthritis Index pain scale, Verbal Descriptor Scale and Present Pain Intensity were between 0.77 and 1.00 (P < 0.01). All pain measures showed high test-retest reliability (r = 0.98-1.00, P < 0.01). Staff's pain ratings using the Western Ontario and McMaster Osteoarthritis Index pain scale were strongly correlated with elders' pain ratings using any pain measure (r = 0.68-0.80, P < 0.05 or P < 0.01). However, staff's pain ratings using either the Verbal Descriptor Scale or Present Pain Intensity had no association with elders' pain ratings (r = -0.07 to -0.30, P = NS).

CONCLUSION

The study confirmed that the Western Ontario and McMaster Osteoarthritis Index pain scale is as valid and reliable as the Verbal Descriptor Scale and Present Pain Intensity for elders with moderate and mild cognitive impairment. When used by staff, the Western Ontario and McMaster Osteoarthritis Index pain scale provides a better pain assessment for cognitively impaired elders than the Verbal Descriptor Scale or Present Pain Intensity.

Osteoarthritic knee or hip pain: possible indicators in elderly adults with cognitive impairment

Many elderly individuals with cognitive impairment (CI) suffer from chronic pain resulting from osteoarthritis (OA). They have diminished ability to communicate their pain to health care providers, and when pain is undetected, it may be untreated. A method of detecting chronic OA pain in elderly individuals with Cl and measuring treatment outcomes is thus urgently needed. This article examines indicators of chronic OA pain in cognitively intact elderly individuals that could be used to identify pain in elderly individuals with Cl. The review suggests that patients with severe knee or hip OA pain tend to show specific motor patterns, disturbances of gait patterns, and reduction of activity level. Therefore, these behaviors could serve as alternatives to verbal report of chronic pain in elderly individuals with Cl and knee or hip OA.