Table 3.

The adjusted odds ratios of LGA (>90th percentile) for maternal selenium levels in the serum at the end of first trimester, in the whole group and subgroups.

			Odds Ratios of LGA (>90th Percentile)
Quartiles	Se Levels (µg/L)	LGA/AGA	OR * (95% CI); p ***	AOR * (95% CI); p **
Whole group (N = 330)
Q1	42.69–55.88	21/61	2.51 (1.10–5.74); 0.029	3.00 (1.26–7.15); 0.013
Q2	55.88–61.16	20/63	2.32 (1.01–5.32); 0.047	2.41 (1.02–5.67); 0.044
Q3	61.16–66.01	15/67	1.63 (0.69–3.89); 0.266	1.71 (0.71–4.15); 0.234
Q4	66.01–125.54	10/73	1 ***	1 ***
Women with the normal BMI (N = 145) #
Q1	42.68–58.27	11/25	3.63 (1.03–12.76); 0.044	4.79 (1.13–20.26); 0.033
Q2	58.27–61.86	8/28	2.36 (0.64–8.66); 0.197	3.00 (0.74–12.28); 0.126
Q3	61.86–67.69	4/32	1.03 (0.24–4.48); 0.967	1.46 (0.30–7.09); 0.635
Q4	67.69–89.17	4/33	1 ***	1 ***
Women with a male fetus (N = 176)
Q1	44.39–56.32	16/28	4.42 (1.36–14.34); 0.013	6.26 (1.79–22.05); 0.004
Q2	56.32–61.46	8/36	1.82 (0.52–6.32); 0.347	1.97 (0.56–7.02); 0.293
Q3	61.46–67.32	8/36	1.94 (0.55–6.83); 0.301	2.32 (0.64–8.45); 0.200
Q4	67.32–125.54	5/39	1 ***	1 ***

! Selenium concentrations were measured in the serum from the 10–14th week, and border values were included in the lower quartile; * OR: crude odds ratios calculated in the univariate logistic regression in matched groups and AOR: adjusted odds ratio calculated in the multivariate logistic regression after adjusting for maternal height, gestational weight gain per week, and prior fetal macrosomia; ** p-value obtained using the Wald test (p < 0.05 was considered to be significant); *** the reference quartile with the lowest number of LGA cases (OR/AOR = 1.00); CI: confidence intervals; LGA cases (mothers delivering to newborn > 90th percentile); AGA controls (mothers delivering to newborn between the 10th and 90th percentile). # Subgroup of the normal pre-pregnancy body mass index: 18.50–24.99 kg/m².