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Table 5 Adjusted odds ratios for health facility delivery (N = 4198)

From: Errors in estimated gestational ages reduce the likelihood of health facility deliveries: results from an observational cohort study in Zanzibar

Variable

Odds Ratio

Standard Error

95% CI

p-value

Difference in delivery dates category

 Accurate

EDD is 6 days before to 14 days after ADD

1 (REF)

   

 Underestimate

EDD is 7 days or more before ADD

1.005

0.165

(0.730, 1.386)

0.975

 Moderate overestimate

EDD is 15 days to 35 days after ADD

0.757

0.081

(0.614, 0.934)

0.009

 Severe overestimate

EDD is 36 days or more after ADD

0.839

0.086

(0.687, 1.025)

0.086

Age

 10–20

1 (REF)

   

 21–30

0.778

0.104

(0.599, 1.010)

0.059

 31–40

0.711

0.104

(0.534, 0.947)

0.020

 41+

0.892

0.265

(0.498, 1.597)

0.700

District

 North A

1 (REF)

   

 North B

1.035

0.108

(0.843, 1.271)

0.741

 Central

0.991

0.124

(0.775, 1.267)

0.942

 West

1.673

0.222

(1.290, 2.170)

< 0.001

 South

4.107

1.27

(2.237, 7.539)

< 0.001

HIV status

 Negative

1 (REF)

   

 Positive

0.881

0.256

(0.498, 1.558)

0.663

 Unknown

0.267

0.065

(0.165, 0.432)

< 0.001

Past home delivery

 No

1 (REF)

   

 Yes

0.246

0.022

(0.205, 0.293)

< 0.001