Risk of Preterm Delivery Associated with Prior Treatment of Cervical Precancerous Lesion according to the Depth of the Cone

Table 1

Patients’ features.

	Term delivery; (percentage)	Spontaneous preterm delivery (percentage)	P
Age
<20	—	—	n.s.*
20–30	11 (29.7)	4 (50)
30–40	23 (62.2)	4 (50)
>40	3 (8.1)	—
Ethnicity
Caucasian	34 (91.9)	8 (100)	n.s.*
Other	3 (8.1)	—
Socioeconomic status
Upper middle class	27 (73)	5 (62.5)	n.s.*
Lower middle class	4 (10.8)	2 (25)
Other	6 (16.2)	1 (12.5)
Parity
Nulliparous	26 (70.3)	8 (100)	n.s.*
Nonnulliparous	11 (29.7)	—
Conization-to-conception interval
<1 year	19 (51.4)	1 (12.5)	0.04*
>1 year	18 (48.6)	7 (87.5)

∗Chi square test (𝜒² test).