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Table 2 Tobacco exposure, morbidity during pregnancy and prenatal care characteristics of mothers of low and normal birthweight infants

From: Socioeconomic factors and low birth weight in Mexico

Variable

Birthweight

OR

95% CI

 

<2500 grs (n = 158)

≥ 2500 grs (n = 474)

  

Smoking before pregnancy

    

No

126

384

1.0

 

Yes

32

90

1.09

[0.70,1.71]

Smoking during pregnancy

    

No

149

451

1.0

 

Yes

9

23

1.19

[0.53,2.66]

Hypertension during pregnancy

    

No

131

416

1.0

 

Yes

27

58

1.53

[0.93,2.53]

Urinary tract infection during pregnancy

    

No

100

318

1.0

 

Yes

58

156

1.22

[0.83,1.77]

Calcium supplementation

    

Yes

146

409

1.0

 

No

12

65

1.86

[0.97,3.56]

Iron supplementation

    

Yes

64

216

1.0

 

No

94

258

1.20

[0.83,1.74]

Prenatal care

    

Yes

150

454

1.0

 

No

8

20

1.07

[0.45,2.52]