Characteristics of the cohort study population by region at the onset of the study (2008 in Catalonia and Navarre, 2010 in the Balearic Islands)
| Catalonia n = 1 41 071 | Navarre n = 73 644 | Balearic Islands n = 1 78 251 | |
| Age (years), SD | 50.37 (17.23) | 54.04 (18.26) | 47.65 (17.56) |
| Sex (female), number (%) | 72 340 (51.28) | 37 898 (51.46) | 94 164 (52.83) |
| Number of visits, mean (SD); median (IQR) | 11.69 (12.19); 9.00 (3.00–16.00) | 8.93 (9.30); 7.00 (3.00–12.00) | 11.01 (13.25); 7.00 (3.00–15.00) |
| Number of health problems, mean (SD); median (IQR) | 6.23 (4.58); 5.00 (3.00–8.00) | 9.95 (5.39); 9.00 (6.00–13.00) | 11.85 (7.74); 10.00 (6.00–16.00) |
Patients belonged to 22 primary healthcare teams in each region.
Abbreviations: SD, standard deviation; IQR, interquartile range.