BMC Sports Science, Medicine and Rehabilitation

Table 12 Comparison of amount of alcohol consumption per day between groups

From: Vitamin D levels and bone mineral density of middle-aged premenopausal female football and volleyball players in Japan: a cross-sectional study

	Non-exercise	Volleyball	Football	P-value ^b
	(n = 25)	(n = 40)	(n = 27)	P-value ^b
Non	6	14	10	0.54
Non	(24.0) ^a	(35.0)	(37.0)
< 20 g ^c	11	17	12
< 20 g ^c	(44.0)	(42.5)	(44.4)
20–40 g	7	6	4
20–40 g	(28.0)	(15.0)	(14.8)
40–60 g	0	0	1
40–60 g	(0.0)	(0.0)	(3.7)
60–80 g	0	0	0
60–80 g	(0.0)	(0.0)	(0.0)
> 80 g ^d	1	3	0
> 80 g ^d	(4.0)	(7.5)	(0.0)

^a Number (%)
^b P: analysis of covariance
^c <20 g: less than 20 g/day
^d >80 g: more than 80 g/day

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ISSN: 2052-1847

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