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Table 3 Birth weight v gestational age in HES 1995 data

From: Investigating increased admissions to neonatal intensive care in England between 1995 and 2006: data linkage study using Hospital Episode Statistics

Birth weight category Gestational age (weeks)  
  20 21 22 23 24 25 26-29 30-34 35-39 40+ Missing Total
<500 19 23 39 36 53 40 117 91 960 1224 32 2634
  (0.003) (0.004) (0.007) (0.006) (0.009) (0.007) (0.020) (0.016) (0.167) (0.213) (0.006) (0.458)
500-999 3 7 29 103 273 292 864 181 36 19 89 1896
  (0.001) (0.001) (0.005) (0.018) (0.047) (0.051) (0.150) (0.031) (0.006) (0.003) (0.015) (0.329)
1000-1499 0 1 0 1 6 20 1179 1590 326 180 152 3455
  (0.000) (0.000) (0.000) (0.000) (0.001) (0.003) (0.205) (0.276) (0.057) (0.031) (0.026) (0.600)
1500-1999 0 2 1 0 4 2 141 3785 2010 94 224 6263
  (0.000) (0.000) (0.000) (0.000) (0.001) (0.000) (0.025) (0.658) (0.349) (0.016) (0.039) (1.088)
2000-2499 0 0 0 1 0 2 26 3367 13684 1831 617 19528
  (0.000) (0.000) (0.000) (0.000) (0.000) (0.000) (0.005) (0.585) (2.378) (0.318) (0.107) (3.393)
2500-2999 0 0 1 0 0 5 24 1053 47425 21521 2069 72098
  (0.000) (0.000) (0.000) (0.000) (0.000) (0.001) (0.004) (0.183) (8.241) (3.739) (0.360) (12.528)
3000-3499 0 5 2 3 6 2 30 334 67091 80740 4400 152613
  (0.000) (0.001) (0.000) (0.001) (0.001) (0.000) (0.005) (0.058) (11.658) (14.029) (0.765) (26.518)
3500-3999 2 1 4 1 3 5 13 117 33709 82270 3480 119605
  (0.000) (0.000) (0.001) (0.000) (0.001) (0.001) (0.002) (0.020) (5.857) (14.295) (0.605) (20.782)
4000-4499 0 0 0 0 0 0 5 32 7202 29943 1040 38222
  (0.000) (0.000) (0.000) (0.000) (0.000) (0.000) (0.001) (0.006) (1.251) (5.203) (0.181) (6.641)
4500-4999 0 0 0 0 0 0 2 4 916 4763 175 5860
  (0.000) (0.000) (0.000) (0.000) (0.000) (0.000) (0.000) (0.001) (0.159) (0.828) (0.030) (1.018)
5000+ 0 0 0 1 1 0 8 4 132 520 28 694
  (0.000) (0.000) (0.000) (0.000) (0.000) (0.000) (0.001) (0.001) (0.023) (0.090) (0.005) (0.121)
Missing 4 5 6 10 23 30 110 169 315 269 151700 152641
  (0.001) (0.001) (0.001) (0.002) (0.004) (0.005) (0.019) (0.029) (0.055) (0.047) (26.359) (26.523)
Total 28 44 82 156 369 398 2519 10727 173806 223374 164006 575509
  (0.005) (0.008) (0.014) (0.027) (0.064) (0.069) (0.438) (1.864) (30.200) (38.813) (28.498) (100.000)
  1. Numbers of subjects (percentages of overall data set) according to birth weight (g) by gestational age (weeks), as recorded in the 1995 Hospital Episode Statistics data set