Table V.

Correlation between extension strength and Short Form 8 parameters by Spearman’s test

	Median point (IQR)	Correlation coefficient	p-value
PF	41.5 (41.5 to 53.5)	0.50	0.038*
RP	47.4 (40.7 to 54.1)	0.47	0.055
BP	46.1 (46.1 to 58.4)	0.44	0.071
GH	50.3 (50.3 to 50.3)	0.19	0.419
VT	53.7 (44.5 to 53.7)	0.02	0.946
SF	55.1 (45.6 to 55.1)	0.16	0.514
RE	54.2 (43.7 to 54.2)	0.26	0.281
MH	50.7 (44.9 to 56.9)	0.32	0.184
PCS	42.9 (42.3 to 52.1)	0.45	0.062
MCS	52.7 (45.8 to 55.9)	0.02	0.172

^*Statistically significant difference

PF, physical functioning; RP, role physical; BP, bodily pain; GH, general health perceptions; VT, vitality; SF, social functioning; RE, role emotional; MH, mental health; PCS, physical component summary; MCS, mental component summary