. 2023 Sep 11;15(18):3939. doi: 10.3390/nu15183939

Table 4.

Association between maternal iron level in the second trimester and mild thinness of preschoolers according to subgroups.

Subgroups	Crude Model ^a	P _interaction	Adjusted Model 1 ^b	P _interaction	Adjusted Model 2 ^c	P _interaction
Subgroups	OR (95% CI)	P _interaction	OR (95% CI)	P _interaction	OR (95% CI)	P _interaction
Maters
Parity
1	0.69 (0.55–0.88)	0.325	0.69 (0.54–0.88)	0.297	0.68 (0.52–0.90)	0.280
≥2	1.02 (0.42–2.49)	0.325	1.14 (0.44–2.99)	0.297	0.64 (0.16–2.49)	0.280
Gravidity
1	0.76 (0.57–1.00)	0.618	0.76 (0.57–1.02)	0.604	0.75 (0.54–1.05)	0.672
≥2	0.64 (0.44–0.95)	0.618	0.63 (0.42–0.95)	0.604	0.56 (0.34–0.93)	0.672
Infants
Newborn gender
Male	0.71 (0.50–0.99)	0.684	0.81 (0.54–1.20)	0.652	1.06 (0.62–1.80)	0.631
Female	0.72 (0.52–0.98)	0.684	0.71 (0.50–1.00)	0.652	0.66 (0.45–0.96)	0.631
SGA
Yes	0.37 (0.19–0.69)	0.034 *	0.29 (0.14–0.58)	0.026 *	0.34 (0.14–0.87)	0.026 *
No	0.83 (0.64–1.06)	0.034 *	0.83 (0.64–1.07)	0.026 *	0.76 (0.56–1.02)	0.026 *

Notes: OR, odd ratio; CI, confidence interval; SGA, small for gestational age. ^a Crude model. ^b Adjusted model 1: adjusted for maternal age, pre-pregnancy BMI, parity, gravidity, newborn gender, and gestation age. ^c Adjusted model 2: adjusted for variables in model 1 and the other four maternal essential metal elements. * p <0.05.