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Table 2 Mother’s history of prevailing conditions and obstetric characteristics associated with maternal mortality in a tertiary hospital in Kenya from January 2004 to March 2011

From: Risk factors for maternal mortality in a Tertiary Hospital in Kenya: a case control study

History of prevailing medical conditions

Risk factor

Cases n = 150 n (%)

Controls n = 300 n (%)

Unadjusted OR (95% CI)

Adjusted OR (95% CI)a

P-value

Smoking

     

Yes

2(1)

7(2)

0.6(0.1–2.7)

  

No

148(99)

286(98)

1

  

Alcohol

    

0.018

Yes

16(11)

20(7)

1.6(0.8–3.2)

2.5(1.2–5.3)

 

No

134(89)

273(93)

1

  

Contraceptives

    

0.0007

Yes

17(11)

74(25)

0.4(0.2–0.7)

0.3(0.1–0.6)

 

No

133(89)

220(75)

1

  

Abortion

     

Yes

11(7)

20(7)

1.1(0.5–2.4)

  

No

139(93)

279(93)

1

  

Twins

     

Yes

10(7)

17(6)

1.2(0.5–2.7)

  

No

140(93)

283(94)

1

  

Gravida

    

0.0049

Primigravida

34(23)

104(35)

1

  

Multigravida

73(49)

153(51)

1.5(0.9–2.4)

1.5(0.9–2.5)

 

Grandmultigravida

43(29)

43(14)

3.1(1.7–5.4)

2.6(1.4–4.8)

 

Underlying medical conditions*

     

Yes

41(27)

29(10)

3.5(2.1–5.9)

3.0(1.7–5.3)

 

No

109(73)

271(90)

1

  

Obstetric and reproductive characteristics

     

Mode of delivery

    

0.0006

Normal

64(43)

230(77)

1

  

Assisted

27(18)

13(4)

7.5(3.6–15.3)

4.4(1.7–11.2)

 

Caesarean

51(34)

57(19)

3.2(2.0–5.1)

3.0(1.5–5.6)

 

Did not deliver

8(5)

0

omitted

omitted

 

Birth attendant

    

<0.0001

Nurse/midwife

70(53)

264(89)

1

1

 

Doctor

61(47)

31(11)

7.4(4.5–12.3)

4.1(2.2–7.6)

 

Pregnancy stage

    

<0.0001

Intrapartum

61(42)

259(86)

1

1

 

Antepartum

53(37)

29(10)

7.8(4.6–13.2)

3.0(1.5–6.2)

 

Puerperium

30(21)

12(4)

10.6(5.1–21.9)

8.9(3.5–22.7)

 

Labour stage

     

Latent

42(42)

68(24)

1

  

Active

37(37)

180(63)

0.3(0.2–0.6)

  

Second stage

20(20)

34(12)

1.0(0.5–1.9)

  

Number of ANC visits

    

<0.0001

1 to 3

71(50)

199(67)

1

1

 

None

59(42)

14(5)

11.8(6.2–22.5)

5.7(2.6–12.4)

 

Above 4

11(8)

83(28)

0.4(0.2–0.7)

0.6(0.3–1.2)

 

Place of ANC attendance ††

     

Health centre

41(28)

122(41)

1

  

Hospital

26(18)

60(20)

1.3(0.7–2.3)

  

MTRH

19(13)

100(34)

0.6(0.3–1.0)

  

None

59(41)

14(5)

12.5(6.3–24.8)

  
  1. *These include: HIV, malaria, rheumatic heart disease, cardiovascular disease, and diabetes.
  2. P- value for Likelihood Ratio Test in the adjusted model.
  3. aAdjusted for variables included in the final demographic model.
  4. Reference category for logistic regression represented by 1.
  5. ††Did not include ANC place because of high correlation with number of ANC visits.
  6. Numbers may not add to total sample due to missing values.