Table 2

Comparison of several features in PNDM and TNDM cases in the French cohort (n = 50) (adapted from [9]).


PNDM n = 21
TNDM n = 29
P value

Gestational age (weeks)
39.2 ± 1.6
38.2 ± 2.2
P = 0.15
Birth weight (g)
2497 ± 690
1987 ± 510
P < 0.006
Birth length (cm)
47.5 ± 2.4
44.3 ± 3.4
P < 0.006
Head circumference (cm)
33 ± 1.9
31.5 ± 1.8
P < 0.02
Intrauterine growth retardation
n = 7/19 36%
n = 20/27 74%
P < 0.03
Median age at diagnosis (days) (range)*
27 (1–127)
6 (1–81)
P < 0.01
Initial insulin dose (unit/kg/day)
1.4 ± 1.2
0.6 ± 0.25
P < 0.006

* Given the non-Gaussian distribution of age in the study population, the nonparametric Mann-Whitney U-test was used to compare age in the two groups.

Polak and Cavé Orphanet Journal of Rare Diseases 2007 2:12   doi:10.1186/1750-1172-2-12