Longitudinal study of pregnancy intention and its association with pregnancy occurrence among female sex workers in Benin and Mali

Table 4 Incidence rate of pregnancy (to first occurrence) according to intention level among 416 female sex workers over twelve months of follow-up

	Pregnancies/Per years at risk	Incidence per 100 person-years°	Crude		Adjusted*		Adjusted/IPCW**		P-trend***
	Pregnancies/Per years at risk	Incidence per 100 person-years°	HR°°	95% CI	HR	95% CI	HR	95% CI
	63/330.5	19.06
3-category intention
Positive intention	17/49.8	34.17	1		1		1
Ambivalence	17/90.0	18.89	0.55	0.28–1.09	0.67	0.30–1.47	0.71	0.32–1.60
Negative intention	29/190.8	15.20	0.44	0.24–0.82	0.46	0.21–0.99	0.46	0.21–1.01	0.0529
2-category intention
Positive intention	25/82.3	30.40	1		1		1
Negative intention	38/248.3	15.31	0.50	0.30–0.84	0.51	0.27–0.98	0.53	0.28–1.01	-

*Adjusted for country, age, migrant status, religion, number of biological children, duration of involvement in sex work, condom use with a boyfriend and hormonal contraception
**Model adjusted with IPCW, Inverse probability of censoring weight
***p-value, test for linear trend for the model adjusted with IPCW
°Time to first pregnancy analysis
°°Hazard ratio of having at least one pregnancy according to intention level

ISSN: 1742-4755