. Author manuscript; available in PMC: 2022 Apr 28.

Published in final edited form as: Br J Nutr. 2016 Feb 28;115(4):644–649. doi: 10.1017/S0007114515004870

Table 2.

Stratified analysis for birth weight by maternal baseline Hb concentration in Chinese women^†

(Mean values and standard deviations; β coefficients and 95 % confidence intervals)

Maternal baseline Hb concentration	Groups	n	Birth weight (g)		Adjusted^‡
Maternal baseline Hb concentration	Groups	n	Mean	SD	β	95 % CI	β	95 % CI
≤132 g/l	FA	4801	3291	390	Ref.		Ref.
	IFA	4859	3295	390	3·38	− 11·79, 18·54
	MMN	4801	3296	388	3·07	− 12·14, 18·29	− 0·28	− 15·46, 14·90
133–145 g/l	FA	931	3307	385	Ref.		Ref.
	IFA	872	3282	386	− 21·05	− 56·69, 14·59
	MMN	904	3315	405	9·38	− 25·93, 44·68	29·75	− 6·29, 65·78
>145 g/l	FA	160	3195	468	Ref.		Ref.
	IFA	178	3280	382	91·44	3·37, 179·51^*
	MMN	199	3311	415	107·63	21·98, 193·28^*	16·60	− 63·91, 97·11

FA, folic acid; IFA, Fe–FA; MMN, multiple micronutrients, Ref. referent values.

P < 0·05.

^†

Interaction test shows significant interaction of micronutrient supplementation with baseline Hb level on birth weight.

^‡

With adjustment for week of enrolment and gestational age at delivery.