Table 4 Parameter estimates from univariate and multivariable logistic regression model predicting the likelihood that a pregnant woman is co-infected with STH and malrai, Gilgel Gibe Dam area, Southwest Ethiopia, August to September 2011

Residence

Rural

195

19

1.77

0.82-3.81

Urban

193

11

1

House type

Thatched

148

16

1.96

0.92-4.13

Corrugated iron sheet

240

14

1

Presence of stagnant water

Yes

62

10

2.94

1.30-6.64

2.89

1.28-6.99

0.012

No

326

20

1

1

Utilization of human feces as fertilizer

Yes

32

7

4.05

1.59-10.36

5.34

1.99-14.28

0.001

No

356

23

1

1

Habit of eating soil

Yes

22

5

4.01

1.37-11.77

4.64

1.50-14.36

0.008

No

366

25

1

1

Trimester

Third trimester

143

13

1.16

0.29-2.15

Second trimester

157

10

0.78

0.44-3.02

First trimester

88

7

1

Parity

Multigravide

263

22

1.33

0.58-3.09

Primigravide

125

8

1