Table 1

Patient characteristics

Suicide cases
n=18 441, (%)
Matched controls
n=36 882, (%)
Age (years)
 15–242825 (15)5650 (15)
 25–343746 (20)7492 (20)
 35–445595 (30)11 190 (30)
 45–556275 (34)12 550 (34)
Sex (male)13 680 (74)27 360 (74)
Income quintile
 Q5 (highest)2839 (15)5678 (15)
 Q43162 (17)6324 (17)
 Q33426 (19)6852 (19)
 Q23814 (21)7628 (21)
 Q1 (lowest)4969 (27)9938 (27)
 Unknown/suppressed231 (1)462 (1)
Home location
 Urban15 532 (84)32 158 (87)
 Rural*2893 (15)4462 (12)
 Missing16 (<1)262 (1)
Comorbidities†
 Alcoholism3109 (17)750 (2)
 Drug dependence/addiction3645 (20)1164 (3)
 Psychoses5373 (29)979 (3)
 Depression5753 (31)1788 (5)
 Anxiety disorder12 807 (69)10 690 (29)
 Personality disorder2391 (13)469 (1)
 Sleep disorders2844 (15)2536 (7)
 Malignancy1024 (6)1331 (4)
 Asthma2291 (12)3247 (9)
 Rhinitis1956 (11)4204 (11)
Health services use in the preceding year
 Six or more clinic visits11 946 (65)12 365 (34)
 One or more emergency room visits4053 (22)3173 (9)
 One or more inpatient admissions1379 (8)511 (1)
OHIP eligible for entire 5-year look-back period17 701 (96)34 447 (93)
  • *Rural includes unknown/suppressed home location.

  • †Comorbidities defined by truncated ICD-9 codes: alcoholism (303), drug dependence/addiction (304), psychoses (291, 292, 295, 296, 298, 299), depression (311), anxiety disorder (300), personality disorder (301), sleep and other disorders (307), malignancy (140–165, 170–175, 179–208), asthma (493), rhinitis (477).

  • ICD-9, International Classification of Disease, Ninth Revision; OHIP, Ontario Health Insurance Plan.