Standard deviation | |||||
---|---|---|---|---|---|
Variable | 1 measure | 2 measures | 3 measures | 4 measures | 5 measures |
GHQ | 8.44 | 7.51 | 7.01 | 6.76 | 6.39 |
Pain | 2.11 | 1.97 | 1.95 | 1.92 | 1.86 |
Fatigue | 2.47 | 2.22 | 2.12 | 2.13 | 2.15 |
Disease activity | 1.89 | 1.80 | 1.79 | 1.77 | 1.73 |
Self-care | 1.92 | 1.77 | 1.67 | 1.69 | 1.69 |
Emotional well-being | 1.73 | 1.65 | 1.52 | 1.47 | 1.43 |
Required sample size (percent reduction) per group | |||||
Variable | 1 measure | 2 measures | 3 measures | 4 measures | 5 measures |
GHQ | 56 | 44 (21) | 39 (30) | 36 (36) | 32 (43) |
Pain | 71 | 61 (14) | 60 (15) | 58 (18) | 55 (23) |
Fatigue | 96 | 78 (19) | 71 (26) | 72 (25) | 73 (24) |
Disease activity | 57 | 51 (11) | 51 (11) | 50 (12) | 48 (16) |
Self-care | 59 | 50 (15) | 44 (25) | 45 (24) | 45 (24) |
Emotional well-being | 47 | 43 (9) | 37 (21) | 34 (28) | 33 (30) |