Correlation between the pain numeric rating scale and the 12-item WHO Disability Assessment Schedule 2.0 in patients with musculoskeletal pain

Both the pain numeric scale and 12-item WHO disability Assessment Schedule 2.0 (WHODAS 2.0) scale are used to ssessed the patients disability and health. Saltychev M et al describe the correlation between pain severity measured by numeric rating scale and functioning level measured by WHODAS 2.0 was weak to moderate, with slightly stronger associations in physical domains of functioning scales.

To estimate the association between pain severity rated on a numeric rating scale and limitations of functioning evaluated with the WHO Disability Assessment Schedule (WHODAS 2.0).

One thousand two hundred seven participants with musculoskeletal pain conditions selected for the analysis. Spearman's and Pearson tests were used to evaluating the association.

However, all the Spearman's rank associations between pain severity and WHODAS 2.0 items were statistically significant, they were often weak, with only some moderate relationships for 'S8 washing', 'S12 day-to-day work' 'S2 household responsibilities', and 'S9 dressing'. The relationship between pain severity and the WHODAS 2.0 total score noticed to be modest. Association between pain level and the WHODAS 2.0 total score evaluated using Pearson's product-moment correlation, yielding values that were comparable to Spearman's correlation.

The individuals with chronic musculoskeletal pain, the association between pain severity and the functioning level were weak to moderate, with moderately substantial correlations in the physical domains of functioning.