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Table 4 Characteristics of children according to seen and not seen status at time of follow up. Aboriginal Birth Cohort Study 1998–2001

From: An Australian Aboriginal birth cohort: a unique resource for a life course study of an Indigenous population. A study protocol

  Total Cohort DHR Subset  
Characteristic Seen at follow up Not seen or found Seen at follow-up Not seen or found Died before follow-up
Number 572 96 489 71 18
Mean birth weight gms (sd)a 3051 (630) 2983 (719) 3112 (578 3127 (607) 2229 (1015)
Mean gestational age weeksa 38.9 (1.78) 38.4 (1.72)* 39 (1.61) 38.8 (1.47) 35.4 (5.9)
% maleb 52% 48% 52% 54% 39%
% Low birth weightb 16 22 12 14  
% Pretermb 10 14 7 9  
% Small for gestational ageb 27 28 25 25  
  1. a t test b Fisher exact test * p =< 0.05 for difference between children seen and not seen or found at follow-up