Data collection

A family physician (first author initials, removed for blinding) called patients from the sample and invited them to participate in a telephone interview using a protocolized oral consent. If the patient accepted, then a form [Appendix 1] was used to collect basic demographic characteristics (age, education, marital status) and the complete list of medications currently consumed by the patients (P-LIST). Each patient was called three times at a different time and day before catalogued as “nonrespondent.”

Abridged version of the form used in telephone interview (translated from Spanish)

The P-LIST was then compared with the list present in the EMR (EMR LIST), and MD was consigned and classified [Table 1]. PIP was detected using STOPP criteria applied to the P-LIST. Since these criteria require in some cases clinical information when necessary the physician consulted the EMR or asked directly to the patient for information.

Basic demographic characteristics of those who accepted (n=150) to participate and those who did not (refused or were nonrespondent, n=64)