Fig. 1
Use of hormonal contraceptives and subsequent risk of suicidal behavior among women with premenstrual disorders (PMDs), by time since the prescription. Superscript small letter “a” (a) indicates the following: use of hormonal contraceptives and antidepressants were mutually adjusted for and the analysis was accounted for non-independence of follow-ups contributed by a same individual using robust sandwich estimator of variance. Estimates were also adjusted for age at follow-up, educational level (primary school, high school, or college and beyond), country of birth (Sweden or other), region of residency (south, middle, or north of Sweden), and psychiatric comorbidities (yes or no). Superscript small letter “b” (b) indicates the following: use of hormonal contraceptives and antidepressants were mutually adjusted for and the analysis was conditioned on each individual. Estimates were also adjusted for age at follow-up and psychiatric comorbidities (yes or no)