Table 3.

Correlation (product moment correlation coefficients) between BSI total score and the SF-36 component and scale scores at the first and the last available (nth) assessment and between difference scores

BSI total score	PCS	MCS	PF	RP	BP	GH	VT	SF	RE	MH
1st Assessment (n = 13,432)	.25	.66	.35	.33	.39	.43	55	.57	.47	.75
nth Assessment (n = 5826)	.36	.76	.44	.51	.48	.57	.66	.69	.60	.82
Difference score 1st interval	.14	.64	.27	.30	.26	.39	.54	.52	.40	.70
Difference score nth interval	.16	.66	.30	.34	.28	.42	.57	.57	.44	.72

All correlations are two-sided significant at p <  .001

PCS Physical Component Score, MCS Mental Component Score, PF Physical Functioning, RP Role limitations Physical, BP Bodily Pain, GH General Health perceptions, VT Vitality, SF Social Functioning, RE Role limitations Emotional, MH Mental Health