Table 5.

Regression coefficients of the association between total fruit and vegetable intake and bone mass in subgroups by sex and age, Guangdong, China, July 2009 to May 2010

	Girls		Boys		Young women		Postmenopausal women
	(n 112)		(n 110)		(n 371)		(n 333)
	β 1	β 2	β 1	β 2	β 1	β 2	β 1	β 2
Bone mineral density
Whole body	0·170(*)	0·140	0·203*	0·131	0·064	0·068	0·144**	0·105(*)
Spine	0·070	0·054	0·084	−0·006	0·014	0·007	0·108*	0·088
Total hip	0·113	0·094	0·240*	0·195*	0·047	0·083	0·110*	0·059
Femoral neck	0·075	0·050	0·192*	0·139	0·026	0·059	0·130*	0·078
Trochanter	0·184(*)	0·201(*)	0·230*	0·190*	0·067	0·097	0·119*	0·049
Femoral shaft	0·094	0·068	0·269**	0·222*	0·043	0·081	0·105(*)	0·056
Ward's area	0·075	0·090	0·221*	0·197*	0·032	0·038	0·107*	0·064
Bone mineral content
Whole body	0·174(*)	0·097	0·218*	0·098	0·111*	0·119*	0·197***	0·107(*)
Spine	0·123	0·121	0·121	0·016	0·011	−0·013	0·163**	0·114(*)
Total hip	0·163(*)	0·118	0·239*	0·139(*)	0·073	0·089	0·205***	0·098(*)
Femoral neck	0·119	0·088	0·198*	0·110	0·033	0·060	0·180***	0·087
Trochanter	0·193*	0·169	0·244*	0·152(*)	0·084	0·077	0·170	0·062
Femoral shaft	0·135	0·077	0·234*	0·134(*)	0·059	0·094	0·174**	0·070
Ward's area	0·124	0·127	0·215*	0·137	0·009	0·007	0·186***	0·085

β ₁ and β ₂, univariate and multivariate regression coefficients, unit: Z-score/Z-score.

Covariates adjusted for in multivariate model: age (years), BMI (Z-score), dietary intakes (Z-score) of energy, protein and Ca, physical activity (Z-score of metabolic equivalent for task), use of vitamin supplements (yes/no), use of Ca supplements (yes/no), sex and Tanner stage (adolescents), and years since menopause (postmenopausal women).

Significance of the regression coefficient: ⁽*⁾ P < 0·1, *P < 0·05, **P < 0·01, ***P < 0·001.