“…This is arguably fundamental information to policy-making (although mental health visits are rare in government reports), but it is much less suitable for causal inference. The SIA/SUS dataset provided us information on the use of these services by older adults 2 , as well as on visits to outpatient mental health services for children 3 and the increased risk of postpartum psychiatric disorders due to the increase in maternal age 1 . However, it provided no information of actual possible causal links.…”