Table 2.

Comparison of bowel cleanness between the two groups.

Group	Cases (n)	Grade I	Grade II	Grade II-III	Grade III	Z	P
Lamaze group	40	13	22	2	3
Control group	45	14	27	2	2	0.1199	0.9046
Total	85	27	49	4	5

Note: using the rank-sum test, P > 0.05 indicated no significant difference in bowel cleanliness.