Table 5.

Odds ratios for the proportion of illness in infants aged 0–11·9 months from eight large cities in China, Maternal Infant Nutrition and Growth (MING) study, October 2011–March 2012

	Total illness		Diarrhoea		Respiratory disease		Allergic disease
	AOR	95 % CI	AOR	95 % CI	AOR	95 % CI	AOR	95 % CI
Feeding mode
EBF	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
MBF	1·30	1·01, 1·68	1·40	1·00, 1·96	1·17	0·89, 1·55	1·09	0·71, 1·68
EFF	1·35	1·01, 1·82	1·02	0·66, 1·57	1·44	1·04, 2·00	1·04	0·63, 1·71
Age
0–2·9 months	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
3–5·9 months	2·96	2·27, 3·86	3·60	2·25, 5·76	3·85	2·77, 5·36	1·05	0·67, 1·63
6–11·9 months	8·07	6·07, 10·71	8·22	5·26, 12·85	9·19	6·61, 12·76	0·96	0·60, 1·53
Sex
Girls	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
Boys	0·99	0·79, 1·23	1·06	0·78, 1·43	1·03	0·81, 1·31	0·92	0·64, 1·34
Birth weight
Low birth weight	3·24	1·27, 8·22	2·78	0·83, 9·31	2·04	0·72, 5·75	1·77	0·50, 6·21
Adequate birth weight	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
Macrosomia	0·84	0·57, 1·24	0·73	0·41, 1·30	0·87	0·56, 1·34	0·66	0·31, 1·39
Delivery mode
Spontaneous delivery	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
Caesarean delivery	0·98	0·78, 1·23	1·00	0·74, 1·35	0·81	0·64, 1·04	1·30	0·89, 1·91
Mother’s education
Middle school or lower	1·00	Ref.	1·00	Ref.	1·00	v	1·00	Ref.
High school and junior college	0·75	0·56, 1·01	0·96	0·65, 1·43	0·65	0·48, 0·89	1·16	0·68, 1·99
College and above	0·60	0·43, 0·84	0·97	0·63, 1·51	0·47	0·33, 0·68	1·12	0·63, 2·00
Monthly income (RMB)
≤2000	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
2001–4000	1·47	1·11, 1·94	1·06	0·73, 1·54	1·19	0·88, 1·61	1·74	1·05, 2·87
>4000	1·10	0·81, 1·48	0·85	0·56, 1·29	0·87	0·63, 1·22	1·45	0·84, 2·50

AOR, adjusted odds ratio; EBF, exclusive breast-feeding; MBF, mixed feeding with breast milk and infant formula; EFF, exclusive formula-feeding; Ref., reference category.

Total illness included diarrhoea, respiratory disease, allergic disease and other illness.