. 2021 May 15;18(10):5277. doi: 10.3390/ijerph18105277

Table 1.

Household and infant characteristics.

	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
	All	Shaanxi 2014	Yunnan 2015	Hebei 2015	Shaanxi 2016	Beijing 2017	Henan 2017	Shaanxi 2017	Yunnan 2019
	(N = 4436)	(N = 525)	(N = 210)	(N = 230)	(N = 1832)	(N = 81)	(N = 271)	(N = 273)	(N = 1014)
Panel A: household characteristics
The primary caregiver is mother (1 = yes)	3179	350	164	185	1286	60	170	167	797
The primary caregiver is mother (1 = yes)	0.72	0.67	0.78	0.80	0.70	0.74	0.63	0.61	0.79
Mother’s age (years)	27.5	26.42	26.81	29.15	27.98	28.52	27.62	28.61	26.55
Mother’s age (years)	5.06	4.55	5.43	4.81	5.01	3.96	4.13	4.2	5.59
Mother’s years of schooling (years)	9.09	8.51	8.50	9.97	9.22	13.1	12.7	12.6	6.87
Mother’s years of schooling (years)	3.56	2.53	3.10	2.94	2.64	2.51	3.08	2.85	4.14
Household has higher socioeconomic status (1 = yes)	2139	120	17	174	930	74	260	160	404
Household has higher socioeconomic status (1 = yes)	0.48	0.23	0.081	0.76	0.51	0.91	0.96	0.59	0.40
Household receives rural subsistence allowance (dibao) (1 = yes)	831	145	31	24	202	6	19	33	371
	0.19	0.28	0.15	0.10	0.11	0.07	0.07	0.12	0.37
Panel B: infant characteristics
Infant age (months)	16.3	24.5	11.7	13.1	14.5	18.2	20.3	18.8	15.3
Infant age (months)	6.79	3.20	3.62	3.14	5.47	9.21	9.52	8.75	5.59
Male infant (1 = yes)	2284	251	111	125	944	44	152	133	524
Male infant (1 = yes)	0.51	0.48	0.53	0.54	0.52	0.54	0.56	0.49	0.52
Infant is premature (1 = yes)	249	56	9	10	85	4	17	20	48
Infant is premature (1 = yes)	0.06	0.11	0.04	0.04	0.05	0.05	0.06	0.07	0.05

Notes: Data are frequency and percent for binary variables (1 = yes; 0 = no), and mean and standard deviation for numeric variables (years or months).