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Table 1 Charactheristics of non-users and users of OTC, Rx, or combined OTC + Rx analgesics

From: Analgesic use in a Norwegian general population: change over time and high-risk use - The Tromsø Study

  Non-users OTC Rx OTC + Rx
  % (n) % (n) % (n) % (n)
Analgesic use (n = 12,481)a 53.8 (6719) 31.7 (3957) 5.1 (641) 9.3 (1164)
Sex, % women (n = 12,481) 41.8 (2818) 65.1 (2561) 58.6 (378) 70.8 (824)
Age (n = 12,481)         
 30–39 3.2 (213) 6.2 (247) 1.2 (8) 3.3 (38)
 40–49 23.1 (1549) 37.4 (1479) 20.7 (133) 31.4 (365)
 50–59 18.4 (1236) 20.5 (813) 16.8 (108) 18.1 (211)
 60–69 35.5 (2388) 24.7 (979) 35.7 (229) 28.4 (330)
 70–79 15.5 (1041) 8.8 (347) 20.1 (129) 14.8 (172)
 80–87 4.3 (292) 2.3 (92) 5.3 (34) 4.1 (48)
 Mean (SD), 30–87 years 58.9 (12.3) 53.6 (12.3) 60.8 (12.0) 57.1 (12.8)
Bad or very bad self-reported health (n = 12,390) 3.2 (226) 4.3 (162) 10.1 (70) 15.9 (185)
Education below college or university (n = 12,341) 59.9 (4029) 63.0 (2278) 69.4 (451) 74.3 (827)
Smoking, current daily (n = 12,329) 18.1 (1194) 21.1 (873) 24.1 (146) 27.5 (318)
Pain lasting three months or more (n = 12,462) 19.9 (1344) 35.6 (1393) 63.1 (404) 74.7 (868)
Headache, last year (n = 11,472) 18.5 (1156) 50.0 (1928) 46.7 (257) 61.3 (645)
Severe pain or stiffness in muscles, last four weeks         
 Neck (n = 10,665) 4.2 (243) 9.6 (326) 20.1 (104) 29.5 (289)
 Hip/leg (n = 10,531) 3.8 (237) 7.8 (249) 20.5 (122) 28.9 (280)
Psychological distressb (n = 11,941) 5.4 (343) 8.7 (340) 11.4 (67) 20.9 (230)
Frequent GP consultations, last 12 monthsc (n = 9335) 10.9 (538) 11.6 (343) 19.7 (105) 25.2 (243)
Drug use, last four weeks         
 Antidepressants (n = 12,195) 1.6 (116) 2.9 (106) 4.3 (29) 9.0 (97)
 Sleeping pills or tranquilizers (n = 12,164) 5.7 (476) 12.0 (445) 14.8 (112) 27.3 (297)
  1. Age-adjusted. The Tromsø Study: Tromsø 6 (2007–8, n = 12,481)
  2. OTC “over-the-counter”, non-prescription, Rx prescription, SD standard deviation, GP general practitioner
  3. aCrude prevalence
  4. bHopkins Symptoms Checklist 10-item version > 1.85
  5. c≥ 6 visits per year (>90th percentile)