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Table 1 Sample characteristics of the study population and baseline sample (Widespread pain in HUNT2)

From: Prevalence and long-term predictors of persistent chronic widespread pain in the general population in an 11-year prospective study: the HUNT study

  Study population *Baseline sample Female Male
  N = 28,367 (%)§ N = 4,927 (%)§ N = 3,372 (68.4) N = 1,555 (31.6)
Sex Females (%) 16,260 (57)    
  Males (%) 12,107 (43)    
Age in years, mean (SD) 47.6 (13.3) 52.3 (11.4) 51.7 (11.5) 53.7 (11.1)
  20-39, (%) 8,397 (30) 733 (15) 558 (17) 175 (11)
  40-59 24,664 (50) 2,892 (59) 1,996 (59) 896 (58)
  60 years or older 5,707 (20) 1,302 (26) 818 (24) 484 (31)
HADS score; (%)     
  HADS, (%) score < 8, 22,560 (81) 3,209 (67) 2,130 (65) 1,079 (71)
  HADS-D, cut off score ≥ 8, 1,124 (4) 300 (6) 167 (5) 133 (9)
  HADS-A, cut off score ≥ 8, 2,672 (10) 754 (16) 583 (18) 171 (11)
  HADS-mixed 1,451 (5) 530 (11) 389 (12) 141 (9)
Sleeping difficulties (%)     
  No problems 21,597 (81) 2,929 (63) 1,899 (59) 1,030 (70)
  Problems 5,195 (19) 1,751 (37) 1,319 (41) 432 (30)
Alcohol use – abstainers (%) 2,546 (9) 552 (12) 444 (14) 108 (7)
  0 times/month 7,256 (27) 1,516 (32) 1,156 (36) 360 (24)
  1-7 times/month 15,790 (58) 2,398 (51) 1,488 (46) 910 (61)
  8 ≥ times/month 1,718 (6) 240 (5) 123 (4) 117 (8)
BMI (%)     
  Underweight 150 (1) 23 (1) 20 (1) 3 (0.2)
  Normal 11,378 (40) 1,593 (32) 1,189 (35) 404 (26)
  Overweight 12,606 (45) 2,262 (46) 1,394 (41) 868 (56)
  Obesity 6,984 (25) 1,040 (21) 761 (23) 279 (18)
Smoking status, (%)     
  Never smoked 12,912 (46) 1,759 (36) 1,315 (39) 444 (29)
  Former smoker 8,249 (29) 1,612 (33) 940 (29) 672 (44)
  Current smoker 6,984 (25) 1,517 (31) 1,089 (28.2) 428 (28)
Exercise, moderate (%)     
  No exercise 16,123 (60) 2,974 (65) 2,044 (66) 932 (63)
  Moderate exercise 10,731 (40) 1,575 (35) 1,035 (34) 540 (37)
Education in years (%)     
  Primary school (%) 8,678 (31) 2,129 (45.6) 1,562 (48) 617 (41)
  High school 12,649 (46) 1,946 (40.7) 1,229 (38) 717 (47)
  College 6,435 (23) 653 (13.7) 472 (14) 181 (12)
Marital status (%)     
  Not married/cohabitant 8,620 (30) 1,226 (25) 882 (26) 344 (22.2)
  Married/cohabitant 19,694 (70) 3,690 (75) 2,482 (74) 1,208 (78)
Chronic disease, (%)     
  No 21,018 (77) 2,156 (47) 1,527 (49) 629 (42)
  Yes 6,116 (23) 2,418 (53) 1,566 (51) 852 (58)
  1. §N in Study population will vary due to missing data.
  2. *Calculated from the study population N = 28,367 (respondents of BOTH questionnaires Q1 and Q2 in HUNT2 and HUNT3).
  3. N will vary slightly because of missing data.