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. 2015 Aug 12;5(8):e007794. doi: 10.1136/bmjopen-2015-007794

Table 2.

Multivariable logistic regression predicting prescription contraception use (1=Yes, 0=No) among study participants (n=1515*)

OCP
Intrauterine contraception
Injections or subdermal contraceptive implant
Predictor variable OR 95% CI OR 95% CI OR 95% CI
Age in years (continuous) 0.92† 0.91 to 0.94 1.10† 1.06 to 1.13 0.92† 0.88 to 0.97
Unmarried (reference) 1.00 1.00 1.00
Married 0.67† 0.51 to 0.89 2.48† 1.62 to 3.80 1.09 0.56 to 2.13
Education at third level—no (reference) 1.00 1.00 1.00
Education at third level—yes 0.83 0.65 to 1.07 0.74 0.49 to 1.12 0.74 0.41 to 1.32
General medical services—no (reference) 1.00 1.00 1.00
General medical services—yes 0.62† 0.46 to 0.83 2.63† 1.76 to 3.91 2.31† 1.33 to 3.99
The OCP has dangerous side effects—other (reference) 1.00 1.00 1.00
The OCP has dangerous side effects—agree 0.52† 0.43 to 0.68 1.19 0.81 to 1.76 0.84 0.47 to 1.49
Taking a break from the long-term use of the OCP is a good idea—other (Ref) 1.00 1.00 1.00
Taking a break from the long-term use of the OCP is a good idea—agree 0.89 0.68 to 1.15 0.73 0.49 to 1.11 0.48† 0.28 to 0.81
How difficult do you find it to get contraception (continuous) 0.80 0.56 to 1.15 1.32 0.66 to 2.66 0.92 0.44 to 1.91
Cannot access contraception/services in your locality-no (reference) 1.00 1.00 1.00
Cannot access contraception/services in your locality—yes 1.20 0.55 to 2.63 1.13 0.26 to 4.97 0.71 0.11 to 4.45
Are embarrassed about accessing contraception/services—no (reference) 1.00 1.00 1.00
Are embarrassed about accessing contraception/services—yes 0.69 0.32 to 1.52 1.48 0.39 to 5.68 0.16 0.01 to 2.13
Cannot afford contraception/services—no (reference) 1.00 1.00 1.00
Cannot afford contraception/services-—yes 0.88 0.40 to 1.92 2.31 0.63 to 8.44 0.99 0.00 to 0.00
Nagelkerke R2 for full model 0.17 0.18 0.11

*numbers vary due to missing values on one or more variables in analyses.

†<0.01; 1=Yes, 0=No; 1=Agree, 0=Other; 1=reference category for binary predictor variables.

OCP, oral contraceptive pill.