Table 2. Relationship between male BMI and the results of ZB tests.

		BMI categories			P
		Normal (n=159)	Overweight (n=120)	Obese (n=27)	Univariate model	Adjusted model*
ZB test	Negative	38.4%	38.3%	25.9%	0.43	0.43
	Positive	61.6%	61.7%	74.1%

Abbreviations: BMI, body mass index; ZB, zona binding.

*Adjusted for age and tobacco use. Frequencies of negative or positive ZB tests across the BMI categories are presented.