Table 2

Univariable logistic regression analysis of risk factors for ‘swine flu uptake’ for children aged 6 months to 5 years, in a Welsh general practice, 2010

VariableNumber (%) of cases (children who were vaccinated), n = 209Number (%) of controls (children who were not vaccinated), n = 60Odds ratio95% CIP-value
Fully vaccinateda
 Yesb206 (98.6)59 (98.3)1.00
 No3 (1.4)1 (1.7)0.860.09 to 8.410.90
Contacted surgery with swine flu concerns in last 9 months
 Yesb30 (14.4)9 (15.0)1.00
 No179 (85.6)51 (85.0)1.050.47 to 2.360.90
Family member received swine flu vaccination?
 Yesb80 (38.8)17 (28.3)1.00
 No126 (61.2)43 (71.7)0.620.33 to 1.170.14
Paternal age
 <30 yearsb36 (17.6)5 (8.3)1.00
 ≥30 years168 (82.4)55 (91.7)0.420.16 to 1.130.09
Maternal age
 <30 yearsb56 (26.9)9 (15.0)1.00
 ≥30 years152 (73.1)51 (85.0)0.480.22 to 1.040.06
Marital status
 Married/cohabitingb187 (89.5)57 (95.0)1.00
 Separated/divorced/single22 (10.5)3 (5.0)2.240.65 to 7.740.20
Income
 <£25 000b32 (17.3)7 (13.2)1.00
 £25 000–45 00065 (35.1)15 (28.3)0.950.35 to 2.56
 >£45 00088 (47.6)31 (58.5)0.620.25 to 1.550.38
Sex
 Maleb101 (48.3)25 (48.1)1.00
 Female108 (51.7)27 (51.9)0.990.54 to 1.820.97
Welsh index of multiple deprivationc
 6.50–8.2051 (24.9)9 (19.1)1.00
 8.21–8.8048 (23.4)17 (36.2)1.870.59 to 5.96
 8.81–10.5036 (17.6)11 (23.4)1.010.31 to 3.30
 10.51–17.0038 (18.5)8 (17.0)1.260.33 to 4.74
 17.01–38.0032 (15.6)2 (4.3)0.470.10 to 2.340.50
Welsh index of multiple deprivationb
 6.50–17.00173 (84.4)45 (95.7)1.00
 17.01–38.0032 (15.6)2 (4.3)4.160.96 to 18.020.06
Age categories, months
 <21b44 (21.1)10 (19.2)1.00
 21–3042 (20.1)9 (17.3)1.060.39 to 2.87
 31–4040 (19.1)10 (19.2)0.910.34 to 2.41
 41–5031 (14.8)10 (19.2)0.700.26 to 1.90
 51–6152 (24.9)13 (25.0)0.910.36 to 2.270.95
Age (continuous variable)0.9980.98 to 1.020.85
  • a Fully vaccinated: the child had received all other routine non-swine flu vaccinations.

  • b Reference category.

  • c Welsh index of multiple deprivation (WIMD). Some missing data existed, hence fewer cases and controls were available for analysis of this variable.