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

Published in final edited form as: J Pediatr. 2015 Mar 11;166(5):1152–1157.e6. doi: 10.1016/j.jpeds.2015.01.044

Table 1.

Characteristics of 228 CF individuals with a NBS IRT value by site.

	Site
	Colorado (n = 111)	Wisconsin (n = 37)	France (n = 80)
IRT, ng/ml, mean (SD)	255 (116)	236 (101)	151 (68)
Age at IRT measurement, days, median (IQR)	2 (1–3)	3 (2–4)	3 (NA)^a
Year of birth, range	1983–2008	1986–2006	1981–2006
Male, n (%)	46 (41)	21 (57)	41 (51)
Meconium ileus positive, n (%)	23 (22)^b	9 (24)	14 (18)^c
Number p.Phe508del mutations, n (%)^d
0	4 (4)	1 (3)	3 (4)
1	45 (41)	9 (24)	24 (30)
2	62 (56)	27 (73)	53 (66)

SD, standard deviation; IQR, inter-quartile range

: All blood samples are drawn at 3 days of age in this sample

: Based on a sample size of 103; 8 subjects missing meconium ileus status.

: Based on a sample size of 76; 4 subjects missing meconium ileus status.

: Cells may not sum to 100% due to rounding.