Table 2. Short Form 36 (SF36) transformed scores of patients with sacroiliac joint (SIJ) pain prior to pelvic belt application (pre) and in a six-weeks follow up with pelvic belt application (post).

Mean values ± standard deviations are given.

	Effect size (d)	Power
Numerical rating scale
Last 2 weeks vs. no belt	0.43	0.52
Last 2 weeks vs. moderate tension	0.73	0.89
Last 2 weeks vs. maximum tension	0.46	0.57
No belt vs. moderate tension	0.35	0.40
Moderate vs. maximum tension	0.31	0.34
Short-Form 36 health survey
Physical summary pre vs. post	0.66	0.83
Physical summary controls vs. patients pre	3.35	1.00
Physical summary controls vs. patients post	1.89	1.00
Mental summary pre vs. post	0.24	0.24
Mental summary controls vs. patients pre	0.14	0.10
Mental summary controls vs. patients post	0.46	0.35