Table 1

Summary statistics across exposure categories in the Hb sample

	No preg. anaemia			Mild preg. anaemia			Moderate or severe preg. anaemia
	Mean	SD	N	Mean	SD	N	Mean	SD	N
Outcome variables in 2017
Hb (child)	10.97	1.35	292	10.71	1.23	305	10.26	1.39	344
Motor skills z-score	−0.02	1.04	284	−0.04	1.00	298	0.07	0.93	335
Language skills z-score	0.01	0.96	291	−0.01	1.00	304	0.00	1.02	344
Cognition skills z-score	−0.01	0.99	290	−0.04	1.02	304	0.07	0.97	340
Socioemo. skills z-score	0.01	0.98	291	−0.02	1.00	304	−0.02	1.02	342
Height-for-age z-score	−2.36	1.39	287	−2.40	1.27	300	−2.54	1.34	338
Weight-for-age z-score	−1.91	1.10	286	−1.94	1.05	294	−2.07	1.08	339
Weight-for-height z-score	−0.98	1.47	288	−0.97	1.71	300	−0.98	1.60	338
Respiratory disease or fever	0.20	0.40	291	0.21	0.41	305	0.20	0.40	344
Diarrhoea incidence	0.24	0.43	287	0.25	0.43	304	0.26	0.44	344
Other child characteristics in 2017
Age of child (months)	27.27	2.43	292	27.26	2.41	305	27.54	2.16	344
Currently breastfed	0.44	0.50	292	0.46	0.50	305	0.44	0.50	344
Sex (male=1)	0.53	0.50	292	0.50	0.50	305	0.53	0.50	344
Pregnancy characteristics at baseline
Hb (preg.)	11.76	0.72	292	10.44	0.29	305	8.68	1.07	344
Gestational trimester during Hb (preg.) measurement	1.89	0.76	292	2.01	0.69	305	2.16	0.69	344
First pregnancy	0.22	0.42	292	0.22	0.41	305	0.19	0.40	344
Any ANC visits	0.53	0.50	292	0.48	0.50	305	0.55	0.50	344
Supplementary iron intake during pregnancy	0.61	0.49	292	0.60	0.49	305	0.57	0.50	344
Other micronutrient intake during pregnancy	0.43	0.50	259	0.40	0.49	265	0.44	0.50	306
Mother characteristics
Hb (mother) in 2017	12.09	1.32	292	11.86	1.35	305	11.14	1.62	344
Mother can read at baseline	0.25	0.43	292	0.27	0.44	305	0.24	0.43	344
Age of mother (years) at baseline	24.65	3.66	292	24.90	3.89	305	24.67	3.93	344
Household characteristics
Food diversity index in 2017	7.01	1.50	292	7.30	1.46	305	7.10	1.52	344
Scheduled case or tribe at baseline	0.29	0.46	284	0.29	0.46	295	0.33	0.47	331
Improved sanitation facility at baseline	0.14	0.34	292	0.12	0.33	305	0.12	0.32	344
Asset index quintile at baseline	3.09	1.44	292	3.01	1.42	305	2.85	1.45	344

ANC, antenatal care; Hb, haemoglobin.