The difference in effectiveness of treatment between the two groups in the primary outcome measure was small and not statistically significant at any time point, even after adjustment for baseline difference in shoulder pain and disability index score (mean difference −4.1, 95% confidence interval −12.3 to 4.1, P=0.32) (table 2).
However, adjusting for baseline differences in BMI and prevalent knee pain suggested that these factors did explain some of the changes in cartilage.
Therefore the purposes of this study were to first assess gender differences in baseline pain levels based on anatomical site in patients of this specialized orthopaedic/rheumatology hospital and second whether any baseline gender differences in pain levels continued 1 month after the start of treatment.
It is therefore questioned whether or not these baseline gender differences in pain levels are actually clinically relevant.
When analyzed from lowest to highest baseline pain tertile, differences in pain score change from baseline increased from -17.0 to -65.0 to -109.5 with AMG 108, whereas with placebo, it remained at approximately -40.0 for each tertile; however, the differences were not statistically significant for any tertile (P = 0.45, 0.39, and 0.13, respectively).
At 3-months post-baseline there were no differences in pain (no pain: 4LB, 22.7%; SSB, 26.7%; p = 0.335) or HRQL outcomes (SF-12 MCS: 4LB, 55.1; SSB, 55.8; p = 0.615; SF-12 PCS: 4LB, 39.0; SSB, 39.6; p = 0.675) and little improvement from the group's low baseline values on the PCS.
Table 3 shows the mean change scores from baseline and adjusted between group differences in pain and disability scores at two weeks/one week and one month and the EQ-5D at one month.
To counteract differences in pain assessment and baseline covariates that could eventually occur among the three trials, all analyses were adjusted by stratifying by RCT.
Participants demonstrated significant differences in pain severity at baseline for right and left limbs based on their treatment assignment, with participants assigned to the visual observation group reporting more severe PLP prior to treatment than those assigned to mental visualization.
In another study, chiropractic care had greater improvement in pain than an educational booklet about LBP after 1 month, but not after 3, 12, or 24 months; after adjusting for baseline variables, the difference in pain after 1 month was no longer significant [ 44].
