Induced abortions of women living with HIV in Finland 1987–2019: a national register study

Table 2 Multivariable logistic regression model for induced abortion vs delivery 1987–2019

Variable	OR	95% Cl		p-value
		lower limit	upper limit
Country of birth
Other (reference Finland)	1.00	0.64	1.55	0.988
Age at conception (per year)	0.96	0.93	0.99	0.006
AIDS
diagnosed during pregnancy	Too few cases
diagnosed before pregnancy	2.61	0.97	7.03	0.057
Number of previous induced abortions
Born in Finland	1.24	0.83	1.84	0.29
Not born in Finland	1.85	1.25	2.72	0.002
Number of previous deliveries
Born in Finland	0.95	0.65	1.39	0.784
Not born in Finland	1.95	1.18	3.21	0.009
Year of conception
1987–1997 (ref)	1
1998–2008	1.39	0.89	2.17	0.153
2009–2019	0.67	0.32	1.42	0.300
HIV diagnosis during pregnancy^a
conception in:
1987–1997	1.08	0.36	3.23	0.889
1998–2008	0.13	0.05	0.35	< 0.001
2009–2019	0.32	0.10	1.01	0.052
HIV diagnosed before pregnancy^a
conception in:
1987–1997	1.92	0.85	4.34	0.117
1998–2008	0.30	0.17	0.55	< 0.001
2009–2019	0.34	0.15	0.76	0.008
Constant (clustering by woman)	2.03	0.94	4.38	0.07

Variables excluded from the model based on AIC, BIC and statistical non-significance p > 0.05: hepatitis B, hepatitis C, route of transmission. Interaction terms included in the model based on AIC, BIC and statistical significance p < 0.05: Relation of HIV diagnosis to period of conception, relations of country of birth to number of previous induced abortions and deliveries
^aDiagnosis considered to be before pregnancy if diagnosis date (sampling date) more than 7 days prior to calculated conception date. If diagnosis date less than 7 days prior to conception date and either more than 10 days before abortion or at less than 23 (gestational) weeks, diagnosis was considered during pregnancy (could affect decision to terminate pregnancy). Consequently in case of giving birth, diagnosis ≥23 weeks was considered not known (= reference)

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