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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: J Pediatr. 2015 Aug 20;167(5):994–1000.e2. doi: 10.1016/j.jpeds.2015.07.050

Table 3.

Comparison of birth characteristics between infants with and those without AE

Birth Characteristics e-ROP cohort infants p value*
Total
(n=1257)
without AEs
(n=1196)
with AEs
(n=61)
GA mean weeks (SD) [range] 27.0 (2.2) [22.7–35.1] 27.0 (2.2) [22.7–35.1] 26.4 (1.8) [23.7–32.1] 0.03
  22 −25 weeks n (%) 436 (35) 404 (34) 32 (52) 0.02
  26 or 27 weeks n (%) 420 (33) 406 (34) 14 (23)
  28 or 29 weeks n (%) 265 (21) 253 (21) 12 (20)
  ≥ 30 weeks  n (%) 136 (11) 133 (11) 3 (5)
BW mean grams, (SD) [range] 864 (212) [330–1250] 866 (214) [330–1250] 824 (183) [476–1180] 0.13
  <500 grams n (%) 34 (3) 32 (3) 2 (3) 0.18
  500–749 grams n (%) 386 (31) 367 (31) 19 (31)
  750–999 grams n (%) 444 (35) 416 (35) 28 (46)
  1000–1250 grams n (%) 393 (31) 381 (32) 12 (20)
Male Gender n % 638 (51) 601 (50) 37 (61) 0.11
Inborn at e-ROP center n (%) 792 (63) 752 (63) 40 (66) 0.67
Race/Ethnicity 0.42
  Non-Hispanic white 621 (49) 588 (49) 33 (54)
  Non-Hispanic black 366 (29) 346 (29) 20 (33)
  Hispanic 122 (10) 119 (10) 3 (5)
  Other/Unknown 148 (12) 143 (12) 5 (8)
*

p value for difference between infants with and without AEs using two-sample t-test for mean and Chi-squared test for proportional difference.

Abbreviations: GA, gestational age; BW, birth weight