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Table 4 Univariate and multivariate regression results for survey response (yes) in the intervention vs. control and across demographics

From: Improving postal survey response using behavioural science: a nested randomised control trial

Variable Response (yes) Unadjusted OR
(95% CI)
p-value Adjusted ORa
(95% CI)
p-value
Group Allocation
 Control 289 (21.42%) 0.003 0.004
 Intervention 357 (26.39%) 1.32 (1.10–1.57) 1.30 (1.09–1.55)
Age (years)
Age 1.01 (1.00–1.02) 0.047 1.01 (1.00–1.02) 0.082
Area-level deprivation
IMD score 0.99 (0.99–1.00) 0.011 0.99 (0.99–1.00) 0.017
NHS Site
Manchester 513 (24.55%) 0.152 0.259
London 133 (21.73%) 0.85 (0.69–1.06) 0.88 (0.71–1.10)
Test result
Test result (1) 505 (22.93%) 0.013 0.024
Test result (2 + 3) 141 (28.2%) 1.32 (1.06–1.64) 1.29 (1.04–1.61)
  1. Note: Test result (1): 1st HPV+/normal cytology, Test result (2 + 3): 2nd or 3rd HPV+/normal cytology, OR: odds ratio, CI: confidence interval, %: percentage
  2. aAdjusted for IMD score, age, NHS site, and test result