Relationship between Perineal Body Length and Degree of Perineal Tears in Primigravidas Undergoing Vaginal Delivery with Episiotomy

Table 5

Odds ratio and p value between risk factors and perineal tears.

Variable	Perineal tears			OR	95% CI
	Grades I and II (n = 64)	Grades III and IV (n = 21)
Perineal body length
≤3.0 cm	21	16	0.003	5.18	1.48–19.19
>3.0 cm	43	5
Birth weight
≥3150 grams	28	14	0.053	2.78	0.87–9.15
<3150 grams	36	7
Head circumference
≥33.5 cm	13	13	<0.001	6.50	1.91–22.92
<33.5 cm	51	8