Table 2.

Main characteristics of the cohort

Characteristic	n	result
Child age
Visit 1 (6-month-old)	180	5.85 ± 0.44 a
Visit 2 (12-month-old)	180	12.13 ± 0.29
Visit 3 (18-month-old)	180	18.12 ± 0.27
Child gender [n (%)]
Male	79	43.89
Female	101	56.11
Breastfeeding [n (%)]
Visit 1 (6-month-old)	88	48.89
Visit 2 (12-month-old)	12	6.67
Visit 3 (18-month-old)	3	1.67
Child nutritional status
Length-for-age z score
Visit 1 (6-month-old)	180	0.58 ± 0.80
Visit 2 (12-month-old)	180	0.43 ± 0.88
Visit 3 (18-month-old)	180	0.41 ± 0.91
Weight-for-age z score
Visit 1 (6-month-old)	180	0.83 ± 0.78
Visit 2 (12-month-old)	180	0.70 ± 0.74
Visit 3 (18-month-old)	180	0.65 ± 0.80
Weight-for-length z score
Visit 1 (6-month-old)	180	0.76 ± 0.88
Visit 2 (12-month-old)	180	0.70 ± 0.77
Visit 3 (18-month-old)	180	0.62 ± 0.82
Mother’s pre-pregnancy height (cm)	180	161.61 ± 4.24
Mother’s pre-pregnancy weight (kg)	180	55.64 ± 8.02
Mother’s pre-pregnancy BMI (kg/m2)	180	21.30 ± 2.93
Caregiver’s schooling years [n (%)]
≦12y	75	41.67
>12y	105	58.33
Annual household income [n (%)]
≦RMB 60 thousand per year	56	31.11
RMB 60-150 thousand per year	81	45.00
>RMB 150 thousand per year	43	23.89

^aMean ± SD (all such values).