Table 3: Variables associated with gestational diabetes in multiple logistic regression analysis.

 

Variables

Odd Ratio

95% Confidence interval

P value

Age (year)

0.97

0.9-1.03

NS

Education (year)

0.86

0.8-0.9

0.001 >

Number of gravida

0.68

0.4-0.9

NS

Pre pregnancy BMI(kg/m2)

1.04

0.9-1.09

NS

Passive smokinga

         Yes

         No

 

1.4

 

0.6-2.8

NS*

History of gestational diabetes

         Yes

         No

 

1.27

 

0.1-12.2

NS

History of familial diabetesb

         Yes

         No

 

1.3

 

0.6-2.7

NS

Urine calcium creatinine ratio

0.42

0.2-0.7

0.001

Nutritional intake of calcium

1

0.9-1.001

NS

Consumption of calcium supplement

0.29

0.1-0.5

0.001 >

Insufficient nutritional intake of calcium(less than RDA recommendation)

 

1.02

 

0.4-2.2

 

NS

 

*NS: Not significant P > 0.05

aPassive smoking was defined as involuntary inhalation of smoke from cigarettes smoked by other people

bFirst-degree relatives