Table 1.

Characteristics of the study subgroups of 23 to 34 weeks and 35 to 42 weeks gestation. Data are presented as quantity or the median with the range provided in brackets.

Characteristics	IUGR	Control
23–34 weeks gestation
Number of fetuses	463	463
Gestational age at CTG (weeks)	32 [23–34]	32 [23–34]
CTG recording length (minutes)	60 [10–60]	20 [10–60]
Time to delivery (days)	1.29 [0.1–86]	46.04 [0.1–126.6]
35–42 weeks gestation
Number of fetuses	700	700
Gestational age at CTG (weeks)	37 [35–42]	37 [35–42]
CTG recording length (minutes)	20 [10–60]	16 [10–60]
Time to delivery (days)	2.06 [0.1–41.3]	5.57 [0.1–50.1]