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Table 2 Adjusted Odds Ratio (with 95% Confidence Interval) of Unwanted Pregnancy Using Multiple Unconditional Logistic Regression and Conditional Logistic Regression Analysis under Case Control Approach

From: Determinants of unwanted pregnancies in India using matched case-control designs

Explanatory Variables Case Control Approach in the Ratio of 1:3 Pair Wise Matching Case Control Approach
EXP (B) 95% C.I. EXP (B) EXP (B) 95% C.I. EXP (B)
Lower Upper Lower Upper
Region       
Central®       
North 0.50 0.44 0.56    
East 0.78 0.70 0.88    
Northeast 0.62 0.55 0.71    
West 0.35 0.30 0.41    
South 0.62 0.54 0.71    
Place of residence       
Rural®       
Urban 1.12 1.02 1.24    
Religion       
Hindu®       
Muslim 1.37 1.24 1.52 1.27 1.02 1.60
Others 1.27 1.10 1.46 1.11 0.83 1.50
Caste       
Others®       
Scheduled Caste 1.06 0.95 1.17 0.96 0.82 1.13
Scheduled Tribe 0.87 0.76 0.98 1.02 0.78 1.34
Women's Education       
Illiterate®       
Literate but below Primary 1.16 1.00 1.33 1.10 0.90 1.36
Primary but below Middle 1.05 0.93 1.19 1.01 0.85 1.20
Middle but below High School 0.92 0.80 1.06 0.91 0.74 1.12
High School and above 0.62 0.53 0.72 0.80 0.64 1.00
Partner’s education       
Illiterate®       
Literate but below Primary 0.98 0.85 1.13 1.14 0.93 1.41
Primary but below Middle 0.95 0.85 1.07 0.98 0.82 1.16
Middle but below High School 0.86 0.76 0.97 0.76 0.64 0.91
High School and above 0.85 0.75 0.97 0.81 0.68 0.97
Wealth index       
Poorest®       
Poorer 1.01 0.89 1.13 0.85 0.72 1.01
Middle 1.07 0.95 1.22 0.83 0.68 1.01
Richer 0.91 0.79 1.05 0.69 0.55 0.87
Richest 0.71 0.59 0.85 0.56 0.42 0.74
Sex of last children       
Male®       
Female 1.33 1.22 1.45 1.46 1.29 1.64
Ever Used Contraceptive       
Never Used®       
Used 1.55 1.43 1.69 1.85 1.64 2.09
Sex Composition of Living Children       
No. of Sons Equal to Daughters®       
No. of Sons Greater than Daughters 0.77 0.70 0.85 1.70 1.47 1.96
No. of Sons Less than Daughters 0.61 0.55 0.68 1.21 1.05 1.40
Experience of Child Loss       
None®       
At least One 1.10 1.01 1.20 1.06 0.94 1.20
Previous Birth Interval       
First Birth®       
Less than 24 months 5.92 4.96 7.07 0.14 0.11 0.17
24 to 36 months 5.05 4.26 6.00 0.96 0.83 1.11
More than 36 months 3.91 3.31 4.62 0.82 0.71 0.94
  1. Note: ® shows reference category.