Table 4.

Associations between number of prescriptions of psychotropic medications between 2013 and 2016, and hormonal contraception use in 2017

Class of psychotropic medication	Number of prescriptions	Model 1			Model 2			Model 3			Model 4
		OR	95% CI	P value	OR	95% CI	P value	OR	95% CI	P value	OR	95% CI	P value
Any psychotropic medication	One prescription	1.05	1.02 to 1.08	0.0001	1.06	1.04 to 1.09	<0.0001	1.04	1.01 to 1.06	0.0072	1.03	1.01 to 1.06	0.014
	≥2 prescriptions	1.02	1.00 to 1.03	0.0295	1.04	1.03 to 1.06	<0.0001	1.08	1.06 to 1.09	<0.0001	1.07	1.06 to 1.09	<0.0001
Antipsychotics	One prescription	0.90	0.86 to 0.94	<0.0001	0.95	0.91 to 1.00	0.0335	0.96	0.92 to 1.01	0.104	0.96	0.92 to 1.00	0.069
	≥2 prescriptions	0.90	0.88 to 0.92	<0.0001	0.97	0.94 to 1.00	0.0198	1.06	1.03 to 1.09	0.0001	1.06	1.03 to 1.09	0.0002
Anxiolytics	One prescription	1.03	0.99 to 1.06	0.121	1.04	1.00 to 1.08	0.0295	1.04	1.01 to 1.08	0.0214	1.04	1.00 to 1.07	0.055
	≥2 prescriptions	0.96	0.93 to 0.99	0.0117	1.02	0.98 to 1.05	0.309	1.10	1.06 to 1.14	<0.0001	1.10	1.06 to 1.14	<0.0001
Hypnotics/ sedatives	One prescription	1.12	1.09 to 1.16	<0.0001	1.12	1.08 to 1.16	<0.0001	1.09	1.05 to 1.13	<0.0001	1.09	1.05 to 1.13	<0.0001
	≥2 prescriptions	1.16	1.12 to 1.20	<0.0001	1.16	1.11 to 1.20	<0.0001	1.18	1.14 to 1.23	<0.0001	1.19	1.15 to 1.24	<0.0001
Antidepressants	One prescription	1.00	0.96 to 1.03	0.724	1.02	0.99 to 1.06	0.165	1.01	0.98 to 1.04	0.479	1.01	0.98 to 1.04	0.575
	≥2 prescriptions	1.02	1.00 to 1.04	0.0178	1.04	1.03 to 1.06	<0.0001	1.07	1.06 to 1.09	<0.0001	1.07	1.06 to 1.09	<0.0001
Psychostimulants	One prescription	0.86	0.72 to 1.02	0.077	0.92	0.77 to 1.09	0.323	0.95	0.79 to 1.13	0.535	0.94	0.79 to 1.13	0.510
	≥2 prescriptions	0.96	0.90 to 1.03	0.252	1.03	0.96 to 1.10	0.405	1.05	0.98 to 1.12	0.213	1.04	0.97 to 1.12	0.247
Psycholeptics and psychoanaleptics	One prescription	1.20	1.09 to 1.33	0.0004	1.19	1.07 to 1.32	0.0012	1.17	1.06 to 1.30	0.0025	1.18	1.06 to 1.31	0.0024
	≥2 prescriptions	1.30	1.16 to 1.45	<0.0001	1.31	1.17 to 1.47	<0.0001	1.35	1.21 to 1.52	<0.0001	1.37	1.22 to 1.53	<0.0001

Model 1 is the unadjusted model; Model 2 is Model 1 adjusted for age group, education and marital status; Model 3 is Model 2 adjusted for socioeconomic status and income level; Model 4 is Model 3 adjusted for recent pregnancy (in 2017), abortion (in 2016–2017) and sterilisation (before 2017).

HC, hormonal contraception.