. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: Pediatr Res. 2014 Dec 18;77(3):472–476. doi: 10.1038/pr.2014.206

Table 1.

Characteristics of Caucasian study participants

Covariate	N (%)	Methemoglobin Value	P^a
Gender
Male	68 (62.4)	0.837 (0.361)	0.98
Female	41 (37.6)	0.839 (0.356)
Multiple Gestation
No	86 (78.9)	0.843 (0.348)	0.74
Yes	23 (21.1)	0.817 (0.399)
Birth weight (g)
< 1000g	67 (61.5)	0.820 (0.353)	0.84
1000–1499g	10 (9.2)	0.872 (0.366)
1500–2499	15 (13.8)	0.907 (0.485)
≥2500	17 (15.6)	0.846 (0.266)
Gestational Age (weeks)
≤28	73 (68.9)	0.809 (0.347)	0.37
29–32	9 (8.5)	0.911 (0.404)
33–36	24 (22.6)	0.912 (0.394)
Ethnicity
Non-Hispanic	103 (94.5)	0.840 (0.355)	0.96
Hispanic or Latino	6 (5.5)	0.834 (0.435)

All values presented as mean (SD)

P-value for t-test comparing mean methemoglobin value