Table 1.

Description of variables in analysis

Variables	Decoding of each response
SES	0=‘low’, 1=‘high’
GWG by IOM recommendations	0=‘below’, 1=‘within and above’
Prepregnancy BMI	0=‘<18.5’, 1=‘≥18.5’
Physical activity during the last trimester of pregnancy	0=‘almost none per week’, 1=‘1–2 days per week’, 2=‘3–4 days per week’, 4=‘5–6 days per week’, 5=‘7 days per week’
Sleep quality in the month before the birth	0=‘bad’, 1=‘good’
A multivitamin supplement during the first trimester of pregnancy	0=‘no’, 1=‘yes’
Infant’s gender	0=‘girl’, 1=‘boy’
Passive smoking during pregnancy	0=‘no’, 1=‘yes’
PIH	0=‘no’, 1=‘yes’
Maternal age	Continuous variable
SGA	0=‘no’, 1=‘yes’

BMI, body mass index; GWG, gestational weight gain; IOM, Institute of Medicine; PIH, pregnancy-induced hypertension syndrome; SES, socioeconomic status; SGA, small-for-gestational-age.