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Table 3 Thresholds for selected sizes of the subgroup for the short-term FFbHR outcome as seen in Additional file 1: Appendix 8, figure (a)

From: Identification of subgroup effect with an individual participant data meta-analysis of randomised controlled trials of three different types of therapist-delivered care in low back pain

Subgroup size Age (<) FFbHR (<)
(0 to 100; 100 = best)
SF-12/36 PCS (<)
(0 to 100; 100 = best)
SF-12/36 MCS (<)
(0 to 100; 100 = best)
Treatment effect
0.001 37 29.17 33.62 28.93 91.29
0.102 91 29.17 67.75 56.82 16.79
0.200 54 54.17 43.62 72.11 13.74
0.308 62 54.17 67.75 72.11 12.72
0.400 62 70.83 40.45 60.35 11.32
0.509 67 62.50 67.75 72.11 10.36
0.602 91 75.00 40.45 60.35 9.96
0.702 91 75.00 47.59 60.35 9.14
0.808 91 100.00 47.59 60.35 8.59
0.906 91 100.00 47.59 72.11 8.47
  1. Adapted with permission from: Patel S, Hee SW, Mistry D, Jordan J, Brown S, Dritsaki M, Ellard DR, Friede T, Lamb SE, Lord J, Madan J, Morris T, Stallard N, Tysall C, Willis A, Underwood M, the Repository G. Programme Grants for Applied Research. Identifying back pain subgroups: developing and applying approaches using individual patient data collected within clinical trials. Southampton (UK): NIHR Journals Library