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Table 2 Basic characteristics of the study population (n = 54,599)

From: Reference curves of birth weight, length, and head circumference for gestational ages in Yogyakarta, Indonesia

Characteristic Category No %
Health facility Sardjito hospital 13,726 25.1
  District hospitals 30,574 56.0
  Health centers 10,299 18.9
Gender Boys 29,112 53.3
  Girls 25,487 46.7
Birth order First (1st child) 26,189 48.0
  Later (≥2nd child) 28,410 52.0
Admitted to neonatal ward Born in the hospital/health centre 45,414 83.2
Referred <24 h 9,185 16.8
Education of mother (years) ≤5 1,803 3.8
6–12 40,196 82.7
≥13 6,576 13.5
Age of mother (years) ≤19 1,770 3.3
20–34 43,737 81.0
≥35 8,456 15.7
Number of registered infants Birth weight 54,599 100
Length 52,261 95.7
Head circumference 48,109 88.1