Comparison of statistical methods for the analysis of patient-reported outcomes (PROs), particularly the Short-Form 36 (SF-36), in randomised controlled trials (RCTs) using standardised effect size (SES): an empirical analysis

Table 1 Scoring strategies for eight domains in SF-36 version 2

SF-36 Domain	Abbr	No. items	No. levels	Raw score range	No. possible values after recoding
Physical functioning	PF	10	21	10 to 30	21
Role limitation – physical	RP	4	17	4 to 20	17
Bodily pain	BP	2	27	2 to 11	10
General health	GH	5	39	5 to 25	21
Vitality	VT	4	17	4 to 20	17
Social functioning	SF	2	9	2 to 10	9
Role limitation – emotional	RE	3	13	3 to 15	13
Mental health	MH	5	21	5 to 25	21

ISSN: 1477-7525