Table 2.

The frequency of the specific alleles and genotypes of the UGT1A1*28 variant in the group of women with osteopenia and controls.

Genotypes	Osteopenia		Control		OR	95% CI	p
	Observed value n (%)	Expected value %	Observed value n (%)	Expected value (%)
6/6	43 (39.5)	36.7	88 (37.8)	40.3	1.07	0.65–1.75	0.049
6/7	46 (42.2)	47.8	120 (51.5)	46.4	0.69	0.42–1.12
7/7	20 (18.3)	15.5	25 (10.7)	13.3	1.87	0.93–3.70
Total	109 (100%)	100.00	233 (100%)	100.00	–	–	–

The expected value was calculated in accordance with the Hardy–Weinberg equilibrium (HWE). HWE equilibrium test was used to obtain the exact p value.

OR odds ratio.