Table 1. Baseline demographics of participants (N = 133)¹.

Variables	n (%)2
Characteristics of participants
Gender (male)—n (%)	79 (59%)
Location- n (%)
Rural (Wates hospital)	110 (83%)
Urban (Kota Yogyakarta hospital)	23 (17%)
Age (in months)—n (%), N = 132
2–5	32 (24%)
6–11	38 (29%)
12–23	31 (24%)
24–59	31 (24%)
Birth weight (in grams), median (IQR), N = 124	3000 (2775–3300)
Normal (2500–4200 g)	112 (90%)
Low (1500 –<2500 g)	10 (8%)
Very low < 1500 g	2 (2%)
Exclusive breast feeding (EBF)—n (%), N = 111
No	25 (23%)
EBF until 6 months of age, now completed	62 (56%)
ongoing EBF, in participants currently age ≤ 6 months	24 (22%)
Age started formula feeding (in months), median (IQR), N = 123	6 (2–12)
Solid food introduced before 6 months of age- n (%), N = 123	20 (16%)
Socio-environmental characteristics
Mother’s age- n (%), N = 123
< 25 years old	16 (13%)
25–29 years old	35 (29%)
30–34 years old	27 (22%)
35–39 years old	32 (26%)
≥ 40 years old	13 (11%)
Mother educational level—n (%), n = 126
Completed middle school or less	47 (37%)
Completed high school	63 (50%)
Attended University	16 (13%)
Family income per month—n (%), n = 126
IDR < = 1000K	87 (69%)
> IDR 1000 K to < IDR 5000K	36 (29%)
> IDR 5000K	3 (2%)
Solid fuel—n (%)	62 (47%)
Father daily smoker—n (%), n = 126
No or occasionally	61 (48%)
Yes, daily	65 (52%)

1 N = 133 throughout table, unless otherwise specified.

2 variables were presented as n (%) for categorical, mean (±SD) for parametric and median (interquartile range) for non- parametric variables.

1 USD is ~15,000 IDR.