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Table 1 Characteristics of participants by body mass index category

From: Impact of metabolic comorbidity on the association between body mass index and health-related quality of life: a Scotland-wide cross-sectional study of 5,608 participants

  Underweight Normal weight Overweight Obese Morbidly obese p-value Overall
  N = 67 N = 1,797 N = 2,276 N = 1,319 N = 149   N = 5, 608
  N (%) N (%) N (%) N (%) N (%)   N (%)
Age (years)        
   20-44 32 (47.8) 937 (52.1) 858 (37.7) 440 (33.4) 54 (36.2) < 0.001 2,321 (41.4)
   45-64 21 (31.3) 562 (31.3) 916 (40.3) 549 (41.6) 75 (50.3)   2,123 (37.9)
   ≥ 65 14 (20.9) 298 (16.6) 502 (22.1) 330 (25.0) 20 (13.4)   1, 164 (20.8)
Sex
   Male 26 (38.8) 688 (38.3) 1,183 (52.0) 598 (45.3) 36 (24.2) < 0.001 2,531 (45.1)
   Female 41 (61.2) 1,109 (61.7) 1,093 (48.0) 721 (54.7) 113 (75.8)   3,077 (54.9)
Deprivation quintile
   1 (Least deprived) 14 (20.9) 389 (21.7) 498 (21.9) 218 (16.5) 16 (10.7) < 0.001 1,135 (20.2)
   2 11 (16.4) 413 (23.0) 537 (23.6) 258 (19.6) 30 (20.1)   1,249 (22.3)
   3 9 (13.4) 385 (21.4) 503 (22.1) 337 (25.6) 29 (19.5)   1,263 (22.5)
   4 14 (20.9) 322 (17.9) 427 (18.8) 276 (20.9) 26 (17.6)   1,065 (19.0)
   5 (Most deprived) 19 (28.4) 288 (16.0) 311 (13.7) 230 (17.4) 48 (32.2)   896 (16.0)
Metabolic comorbidity        
   No 59 (88.1) 1,632 (90.8) 1,899 (83.4) 990 (75.0) 107 (71.8) < 0.001 4,687 (83.6)
   Yes 8 (12.0) 165 (9.2) 377 (16.6) 329 (25.0) 42 (28.2)   921 (16.4)
Smoking status        
Never smoker 21 (31.3) 748 (41.6) 1, 002 (44.0) 599 (45.4) 60 (40.3) < 0.001 2, 430 (43.3)
   Ex-smoker 7 (10.5) 409 (22.8) 737 (32.4) 447 (33.9) 56 (37.6)   1, 656 (29.5)
   Current smoker 39 (58.2) 640 (35.6) 537 (23.6) 273 (20.7) 33 (22.2)   1, 522 (27.1)
Drinking status        
   Never drinker 12 (17.9) 89 (5.0) 106 (4.7) 72 (5.5) 8 (5.4) < 0.001 287 (5.1)
   Ex-drinker 5 (7.5) 83 (4.6) 85 (3.7) 62 (4.7) 14 (9.4)   249 (4.4)
   Sensible drinker* 39 (58.2) 1, 266 (70.5) 1, 560 (68.5) 936 (70.9) 100 (67.1)   3, 901 (69.5)
   Excessive drinker 11 (16.4) 352 (19.7) 522 (23.0) 246 (18.7) 27 (18.1)   1, 158 (20.7)
   Missing 0 (0) 7 (0.39) 3 (0.13) 3 (0.23) 0 (0)   13 (0.23)
  1. chi-square tests for trend * < 21 units/week for men, < 14 units/week for women