Table 3: Incidence Rate for Premature Delivery in the Presence or Absence of Hiesho by Age Group

Age Regression Coefficient (B) Standard Error (SE) Wald Statistic (SE/B)2 Degrees of Freedom Significant Probability (p) Odds Ratio (OR) 95% Confidence Interval (CI Value)
<35* 1.13 0.30 14.36 1 0.001 3.09 1.72-5.53
35-39** 1.26 0.38 10.72 1 0.001 3.51 1.66-7.43
40≤*** 1.63 0.75 4.67 1 0.030 5.09 1.16-22.2

Goodness of fit of the model
* Chi-square test p<0.001, Hosmer-Lemeshow test 0.96, discriminant accuracy rate 96.7%.
** Chi-square test p<0.001, Hosmer-Lemeshow test 0.31, discriminant accuracy rate 95.7%.
*** Chi-square test p=0.036, Hosmer-Lemeshow test 0.94, discriminant accuracy rate 93.6%.
n *=1783, **=870, ***=157.