Prospective Associations of the Short Form Health Survey Vitality Scale and Changes in Body Mass Index and Obesity Status

Table 2

Tertiles of change in BMI for men and women by SF-36 vitality category. values for chi-square tests are presented.

	Change in BMI (tertiles)
Men
SF-36 vitality	−9.4–0 BMI units	0.1–1.1 BMI units	1.2–11.0 BMI units
High (%)	35	35	30
Medium (%)	34	35	31
Low (%)	33	32	35
value^1			0.126
Women
SF-36 vitality	−13.7–0.3 BMI units	0.4–1.1 BMI units	1.2–8.5 BMI units
High (%)	26	43	31
Medium (%)	42	32	26
Low (%)	37	26	37
value^1			0.002

¹ value for the chi-square test of association between SF-36 category and the tertiles of change in BMI.