Musculoskeletal Pain Experienced on Most Days is a Common Accompaniment of Ageing amongst Community-Dwelling Older Australians: A Questionnaire-Based Study

Medical and exercise consultation use for low back and knee pain among cardiovascular mass screening population: A cross-sectional study

Low back and knee pain, as major symptoms and early signs of osteoarthritis, have restricted healthy life expectancy, and numerous guidelines have recommended therapeutic exercise as the first-line treatment for chronic pain. Proportions of medical and exercise consultation use for those pain have been unclear, and these may change in the future. We performed a cross-sectional study of 2,954 persons aged over 30 years in 2017 as a part of the Circulatory Risk in Communities Study. A generalized linear model with logit link and 11-year age-group moving averages were used to estimate sex- and age-specific average proportions of lifetime pain, chronic pain, and dysfunctional chronic pain of the low back and knee, and history of medical and exercise consultation use. The medical consultation use increased in the order of lifetime pain, chronic pain, and dysfunctional chronic pain, reaching 69.1 % [65.2, 72.8] in women and 74.9 % [70.3, 79.0] in men for chronic low back pain, and 70.3 % [66.1, 74.2] in women and 55.6 % [49.3, 61.7] in men for chronic knee pain. On the other hand, the exercise consultation use accounted for 36.5 % [32.6, 40.6] in women and 28.8 % [24.4, 33.5] in men for chronic low back pain, and 40.8 % [36.5, 45.2] in women and 20.6 % [16.0, 26.0] in men for chronic knee pain. This survey revealed the differences in the multilayer proportions of medical and exercise consultation use for low back and knee pain in the cardiovascular mass screening, suggesting exercise consultation was less often provided compared to medical consultation.

The Pain Clinic for Older People

OBJECTIVE

Multidisciplinary pain clinics have an established role in the management of persistent pain, but there is little evidence to support this approach in an older population. This study describes the characteristics and pain outcomes of patients attending a pain clinic designed exclusively for older people.

METHODS

A retrospective audit was performed of outcomes of the Pain Clinic for Older People (PCOP) in 2015-2019. Response to treatment was determined by change in Brief Pain Inventory (BPI) scores at initial attendance and after a treatment program. Clinically meaningful improvement was defined by the Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (IMMPACT) consensus criteria of ≥30% improvement in average pain and one-point improvement in pain interference. Results were compared with the national benchmark collated by the electronic Persistent Pain Outcomes Collaboration (ePPOC), which reports the combined results from 67 participating Australian and New Zealand pain services.

RESULTS

Patients attending the PCOP had a mean age of 80.5 years and had high rates of frailty (84%), cognitive impairment (30%), and multimorbidity. Significant reductions in BPI average pain and BPI pain interference scores were achieved. Clinically meaningful improvement in BPI average pain was achieved in 63% of patients attending the PCOP who were 65-74 years of age and in 46% of patients who were ≥75 years of age, which met the national benchmark set by ePPOC of 40% for both age groups. Clinically meaningful improvement in BPI pain interference was achieved in 69% of those attending the PCOP who were 65-74 years of age and in 66% of those who were ≥75 years of age, comparable to the ePPOC benchmark of 71% and 65% for the respective age groups.

CONCLUSION

PCOP clients achieved significant and meaningful improvements in their pain outcomes that satisfied the national benchmark. Advanced age, cognitive impairment, frailty and multimorbidity should not be regarded as barriers to benefit from a pain clinic specifically designed for older people.

Severe low back or lower limb pain is associated with recurrent falls amongst older Australians

Background

Few studies have explored the impact of low back or lower limb pain severity on recurrent (≥2) falls in older adults.

Objectives

Investigate the association between the severity of low back or lower limb pain, and ≥2 falls or falls‐related injuries.

Methods

Community‐dwelling Australian males and females in the ASPREE Longitudinal Study of Older Persons (ALSOP), aged ≥70 years. Self‐reported, cross‐sectional questionnaire data regarding number of falls and falls‐related injuries in the last 12 months; and sites and severity of pain experienced on most days. Adjusted relative risks (RR) were estimated from multivariable Poisson regression models, for males and females separately.

Results

Of 14,892 ALSOP participants, 13% (n = 1983) reported ≥2 falls (‘recurrent fallers’) in the last 12 months. Males and females who reported severe low back, or severe lower limb pain on most days were more likely to report ≥2 falls in the last 12 months compared to those with mild pain (lower back: males RR = 1.70 and females RR = 1.5, p = 0.001; lower limb: males RR = 2.0, p < 0.001 and females RR = 1.4, p = 0.003). Female recurrent fallers who reported severe low back (RR = 1.3, p = 0.029) or lower limb (RR = 1.2, p = 0.024) pain on most days were more likely to report a falls‐related injury in the last 12 months compared to females with mild pain.

Conclusion

Severe low back or lower limb pain was associated with an increased likelihood of recurrent falls (males/females) or falls‐related injuries (females only). Assessment of severe low back and lower limb pain should be considered as a priority when undertaking falls‐risk evaluation.

Significance

Severe low back pain, or severe lower limb pain is associated with an increased likelihood of recurrent falls in older males and females, and an increased likelihood of falls‐related injuries in older female recurrent fallers. Assessment and management of severe low back and lower limb pain should be prioritized when undertaking falls‐risk assessment. Future longitudinal research is required to further interrogate this relationship and its underlying mechanisms.

Evaluation of the Pain Impact Index for Community-Dwelling Older Adults Through the Application of Rasch Modelling

OBJECTIVE

Evaluate the Pain Impact Index, a simple, brief, easy-to-use, and novel tool to assess the impact of chronic pain in community-dwelling older adults.

METHODS

A Rasch modelling analysis was undertaken in Stata using a partial credit model suited to the Likert-type items that comprised the Index. The Index was evaluated for ordering of category thresholds, unidimensionality, overall fit to the Rasch model, measurement bias (Differential Item Functioning, DIF), targeting, and construct validity.

RESULTS

The four-item Pain Impact Index was self-completed by 6454 community-dwelling Australians who were aged at least 70 years and experienced pain on most days. Two items showed evidence of threshold disordering, and this was resolved by collapsing response categories (from 5 to 3) for all items. The rescored Index conformed to the unidimensionality assumption and had satisfactory fit with the Rasch model (analyses conducted on a reduced sample size to mitigate the potential for overpowering: n = 377, P > 0.0125, power > 77%). When considering uniform DIF, the most frequent sources of measurement bias were age, knee pain, and upper back pain. When considering nonuniform DIF, the most frequent source of measurement bias was knee pain. The Index had good ability to differentiate between respondents with different levels of pain impact and had highest measurement precision for respondents located around the average level of pain impact in the study sample. Both convergent and discriminant validity of the Index were supported.

CONCLUSION

The Pain Impact Index showed evidence of unidimensionality, was able to successfully differentiate between levels of pain impact, and had good evidence of construct validity.