Table 3

Odds Ratios and Confidence Intervals for hormonal contraceptive effect (HC), medroxy progesterone acetate (DMPA) effect, >4 year HC use on (a). presence and (b). severity of disease.


Presence of disease
Severity of disease
Model
OR (CI)
OR
CI

Hormonal contraceptive use:



Never used
1.0 (reference)
1.0 (reference)
HCa
1.92 (1.11, 3.34)
2.22 (1.05, 4.66)
HC + parity + alcohol intake ab
1.59 (0.87, 2.82)


DMPA use:



Never used
1.0 (reference)
1.0 (reference)
DMPAa
2.43 (1.39, 4.57)
2.51 (1.11, 5.64)
DMPA + parity + alcohol intakeab
2.48 (1.30, 4.74)


Length of exposure:a



Never used
1.0 (reference)
1.0 (reference)
1–4 years
1.47 (0.80, 2.71)
1.68 (0.73, 3.89)
>4 years HC use
3.56 (1.81, 7.00)
4.43 (1.84, 10.67)

a Models were adjusted for age and number of sexual partners.

ab Variables entered; age and number of sex partners, variables offered: parity and alcohol consumption.

McFarlane-Anderson et al. BMC Women's Health 2008 8:9   doi:10.1186/1472-6874-8-9