. Author manuscript; available in PMC: 2013 Mar 28.

Published in final edited form as: Pediatr Res. 2012 Jan;71(1):107–114. doi: 10.1038/pr.2011.14

Table 1.

Comparisons of BW and GA between cases and controls in the different pairs of study groups

Study group		n	BW				GA
Study group		n	Mean	Min	Max	t-test p-value	Mean	Min	Max	t-test p-value
1	AA_BPD_Cas	17	954.53	400	2184	1.34E-08	26.71	24.2	32.5	1.49E-09
2	AA_BPD_Con	98	1835.69	577	3416	1.34E-08	32.49	25.0	39.4	1.49E-09
3	AA_RDS_Cas	85	1223.12	400	3090	3.69E-12	28.85	24.2	37.0	4.18E-14
4	AA_RDS_Con	84	1920.62	666	3416	3.69E-12	32.94	24.5	39.4	4.18E-14
5	CA_BPD_Cas	153	1081.51	400	2378	2.2E-16	27.67	24.0	33.2	2.2E-16
6	CA_BPD_Con	529	1854.53	410	3930	2.2E-16	32.13	24.0	40.4	2.2E-16
7	CA_RDS_Cas	487	1532.65	400	4035	8.47E-16	29.99	22.0	40.4	2.2E-16
8	CA_RDS_Con	434	1910.30	620	4220	8.47E-16	32.79	24.0	40.4	2.2E-16

BPD_Cas: BPD cases; BPD_Con: BPD control=subjects without BPD; RDS_Cas: RDS cases; RDS_Con: RDS control=subjects without RDS. Comparisons of BW and GA between cases and controls in all pairs of study groups were statistically significant (p<0.001). The study group comparisons included study group 1 vs. 2; 3 vs. 4; 5 vs. 6; and 7 vs. 8