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Table 2 Descriptive statistics for a complete group of triplets born in the Netherlands between 2000 and 2006, a subset from this group including all triplets still alive after 28 days, and the NTR sample

From: Birth weight in a large series of triplets

  Dutch triplets
(cohort 2000 -
2006)
Dutch triplets
(cohort 2000 -
2006) alive
after 28 days
NTR sample
Cohort 2000 - 2006 2000 - 2006 1970 - 2006
Parity (% primiparous) 54.7 50.9 51.9
  M (sd) N M (sd) N M (sd) N
BW 1745 (688) 1324 1920 (546) 1092 1900 (471) 1219
GA 32.3 (4.1) 1323 33.4 (2.8) 1092 33.7 (2.6) 1219
Age mother 31.6 (4.3) 486 31.7 (4.2) 379 30.8 (3.6) 348
  1. BW = birth weight; GA = gestational age; NTR = Netherlands Twin Register.