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. 2015 Oct;9(4):446–452.

Table 4.

Summary of Proportion z-Tests between Urinary Problem Groups and Number of vaginal births

Proportions (%)

Number of vaginal births With urinary problem (I) Without any urinary problem (J) Difference (I–J) Z Probability (2-tailed)
1–2 15.32 25.00 −9.68 −1.759 0.078
3 0.00 46.00 −46.00 −8.081 <0 .001
4 18.02 21.00 −2.98 −0.547 0.582
5+ 66.67 8.00 58.67 8.730 <0 .001