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Table 1 Characteristics of study participants. Values given in per cent, with number of individuals in parentheses

From: Disease severity determines health-seeking behaviour amongst individuals with influenza-like illness in an internet-based cohort

  Percentage of individuals per category in each year (No.)
2011–12 (N = 1669) 2012–13 (N = 3443) 2013–14 (N = 3292) 2014–15 (N = 3301) Combined (N = 11,705)
Gender
 Male 39 (651) 37.4 (1287) 35.6 (1173) 34.4 (1135) 36.3 (4246)
 Female 61 (1018) 62.6 (2156) 64.4 (2119) 65.6(2166) 63.7 (7459)
Age (years)
 0–18 4.9 (81) 5.2 (179) 9.5 (314) 6.1 (200) 6.6 (774)
 19–45 46.6 (777) 44 (1515) 39.9 (1313) 37.5 (1237) 41.4 (4842)
 46–65 37.2 (620) 38.8 (1336) 37.2 (1224) 41.4 (1367) 38.9 (4547)
  ≥ 66 10.3 (172) 10.8 (372) 12 (396) 13.8 (455) 11.9 (1395)
Highest qualification achieved
 None 2.9 (49) 2 (69) 11.9 (392) 2.8 (91) 5.1 (601)
 GCSEs/equivalent 5.9 (98) 8.5 (294) 7 (230) 7.8 (257) 7.5 (879)
 A-Levels/equivalent 12.2 (203) 15.5 (534) 11.9 (390) 13.2 (436) 13.4 (1563)
 Undergraduate degree 25.4 (424) 25.5 (879) 24.4 (803) 24.9 (822) 25 (2928)
 Post-graduate degree 50.1 (836) 41 (1413) 40.6 (1336) 42.2 (1392) 42.5 (4977)
Transport used
 Walk/Bike 27.9 (466) 21.5 (741) 22.4 (737) 20.7 (684) 22.5 (2628)
 Personal transporta 43.1 (719) 51.6 (1778) 50.9 (1674) 53.9 (1780) 50.8 (5951)
 Public transport 28.2 (470) 26.5 (913) 26.3 (866) 25 (824) 26.3 (3073)
 Other 0.8 (14) 0.3 (11) 0.5 (15) 0.4 (13) 0.5 (53)
Risk factor
 Children in household 28.5 (476) 32.4 (1114) 33.2 (1092) 31.5 (1038) 31.8 (3720)
 Smokers 9.3 (155) 9.3 (320) 7 (230) 6.8 (225) 8 (930)
 Vaccinated for Flu 40 (667) 34.5 (1188) 36.1 (1189) 38.4 (1266) 36.8 (4310)
 Asthma 10.2 (170) 10.8 (371) 10.1 (332) 10.3 (340) 10.4 (1213)
 Allergies 37.6 (628) 36.5 (1257) 38.9 (1279) 39 (1289) 38 (4453)
 Diabetes 2.8 (47) 3.6 (123) 2.8 (91) 3 (98) 3.1 (359)
 Chronic Lung Disease 0.9 (15) 1.1 (38) 1 (34) 0.9 (30) 1 (117)
 Heart Disease 3.8 (64) 3.8 (130) 4.2 (138) 3.9 (129) 3.9 (461)
 Renal Disease 0.4 (6) 0.3 (11) 0.2 (6) 0.4 (13) 0.3 (36)
 Immunodeficiency 1 (17) 1.7 (59) 1.2 (39) 1.8 (59) 1.5 (174)
  1. ae.g. car or motorbike