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Table 4 Crudea and adjustedb ORs for visiting a health service, by other variables of interest

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

Variable Crude ORs (95% CI)a Fully-adjusted ORs (95% CI) Likelihood Ratio Test p-value for fully-adjusted model
Influenza circulating
 No 1 1 0.1107
 Yes 1.07 (0.90–1.27) 0.79 (0.59–1.05)  
Gender
 Male 1 1 0.0003
 Female 1.46 (1.22–1.74) 1.62 (1.23–2.14)  
Age (years)
 0–18 1 1 0.0387
 19–45 0.48 (0.35–0.67) 0.40 (0.18–0.88)  
 46–65 0.66 (0.48–0.91) 0.49 (0.22–1.08)  
  ≥ 66 0.66 (0.45–0.97) 0.63 (0.27–1.47)  
Highest qualification
 None 1 1 0.1996
 GCSEs/equivalent 1.03 (0.66–1.60) 0.93 (0.47–1.85)  
 A-Levels/equivalent 0.95 (0.63–1.43) 0.86 (0.44–1.67)  
 Undergraduate 0.63 (0.42–0.93) 0.62 (0.32–1.21)  
 Post-graduate 0.60 (0.41–0.87) 0.69 (0.36–1.34)  
Transport used
 Walk/Bike 1 1 0.1105
 Personal transport 1.54 (1.23–1.92) 1.31 (0.94–1.83)  
 Public transport 0.99 (0.76–1.28) 0.93 (0.63–1.38)  
 Other 4.95 (1.63–15.00) 1.76 (0.20–15.33)  
Children in household
 No 1 1 0.4407
 Yes 1.19 (1.00–1.42) 1.11 (0.85–1.46)  
Smoking status
 No 1 1 0.0524
 Yes 1.44 (1.10–1.90) 1.47 (1.00–2.17)  
Flu vaccine
 No 1 1 0.0895
 Yes 1.09 (0.92–1.29) 1.27 (0.96–1.68)  
Asthma
 No 1 1 0.0167
 Yes 1.86 (1.47–2.36) 1.56 (1.08–2.25)  
Allergies
 No 1 1 0.3267
 Yes 1.21 (1.02–1.42) 1.13 (0.88–1.46)  
Diabetes
 No 1 1 0.0007
 Yes 2.17 (1.46–3.22) 2.78 (1.55–5.00)  
Chronic Lung Disease
 No 1 1 0.1912
 Yes 2.78 (1.53–5.03) 1.72 (0.77–3.84)  
Heart Disease
 No 1 1 0.2235
 Yes 1.53 (1.05–2.24) 1.42 (0.81–2.47)  
Renal Disease
 No 1 1 0.2154
 Yes 1.61 (0.51–5.09) 0.31 (0.05–2.14)  
Immunodeficiency
 No 1 1 0.3764
 Yes 2.57 (1.48–4.47) 1.44 (0.65–3.19)  
Self-diagnosis
 Cold 1 1 <0.0001
 Flu 8.19 (6.70–9.99) 3.39 (2.38–4.83)  
Flu Season (year)
 2011–12 0.72 (0.55–0.94) - 0.0621
 2012–13 1 1  
 2013–14 0.65 (0.52–0.82) 0.87 (0.63–1.20)  
 2014–15 1.09 (0.89–1.34) 1.25 (0.95–1.64)  
  1. aThe crude ORs include all four years of data. Due to the inclusion of health-score, for which data was not collected in the 2011–12 season, the fully-adjusted model excludes 2011–12. Crude analyses excluding 2011–12 showed similar results to the crude analyses presented here (Additional file 6: Table S3). bAdjusted for all other variables and severity indicators