Table 3—

Odds ratio (95% CI) of failure to attend eye screening for all patients invited to both the mobile units and the static, hospital-based unit (model 1) and for only those patients invited to the mobile units (model 2)

Variable and categoryModel 1Model 2
Sex
    Male11
    Female0.997 (0.892–1.114)1.040 (0.909–1.190)
Age0.968 (0.965–0.972)*0.964 (0.959–0.969)*
Duration of diabetes
    Years1.019 (1.012–1.027)*1.024 (1.015–1.033)*
A1C
    Excellent11
    Good0.931 (0.819–1.057)0.942 (0.806–1.100)
    Unsatisfactory0.937 (0.805–1.090)0.981 (0.815–1.180)
    Poor1.253 (1.079–1.455)*1.426 (1.190–1.709)*
Blood pressure (mean blood pressure)1.012 (1.007–1.018)*1.007 (1.001–1.014)
Smoking status
    Nonsmoker11
    Ex-smoker1.144 (1.008–1.299)1.134 (0.975–1.320)
    Smoker2.516 (2.186–2.895)*2.265 (1.904–2.694)*
Accessibility to service (min)0.996 (0.988–1.003)1.014 (0.999–1.029)
Carstairs deprivation
    1 Least deprived11
    21.061 (0.864–1.303)1.000 (0.799–1.253)
    31.176 (0.964–1.433)1.071 (0.859–1.335)
    41.500 (1.239–1.816)*1.414 (1.140–1.753)*
    5 Most deprived2.321 (1.917–2.811)*1.981 (1.573–2.495)*
Screening location
    Ninewells Hospital1
    Eye van2.923 (2.484–3.441)*
    Constant0.016 (0.013–0.021)*0.061 (0.047–0.078)*
Observations (patients)25,908 (11,384)13,574 (6,465)
  • *

    * 1% significance level;

  • 5% significance level.