Table 1
Mean birth weight and gestational age of three groups
Number of babies
Mean birth weight (g)
SD
Number of babies
Mean gestational age (weeks)
SD
1989–91
115
1361.7
631.6
124
29.8
3.7
1992–4
115
1207.4
472.0
118
29.2
3.0
1995–7
134
1134.5
372.3
136
29.0
2.8
Total
364
1229.3
505.0
378
29.3
3.2