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Table 3 Primary care and diagnostic intervals (in days) for lung cancer patients with a referral route involving the GP, according to groups. Only GP-involved patients are included in the analyses. Adjusted and unadjusted associations for long intervals (the 75 percentile from 2010) are presented as prevalence ratios (PRs) with 95 % confidence intervals (95 % CI)

From: The effect of direct access to CT scan in early lung cancer detection: an unblinded, cluster-randomised trial

  Primary care interval: Diagnostic interval:
  N Median IQI p-value Prevalence of long interval PR (95 % CI) Unadjusted PR (95 % CI) adjusteda N Median IQI p-value Prevalence of long interval PR (95 % CI) Unadjusted PR (95 % CI) adjusteda
All 155 16 4–56   36.1 (28.6–44.2)    160 39 17–93   33.1 (25.9–41.0)   
Controls 74 18 5–69   36.5 (25.6–48.5) 1 1 75 44 17–112   37.3 (26.4–49.3) 1 1
Intervention 81 14 4–53 0.455d 35.8 (25.4–47.2) 0.98 (0.65–1.49) 0.99 (0.65–1.54) 85 36 17–83 0.299d 29.4 (20.0–40.3) 0.79 (0.51–1.23) 0.80 (0.50–1.27)
Intervention:               
- CMEb 32 37 8–61   53.1 (34.7–70.9) 1 1 35 66 22–143   42.9 (26.3–60.6) 1 1
+ CMEc 49 9 3–27 0.048d 24.5 (13.3–38.9) 0.46 (0.26–0.83) 0.49 (0.27–0.88) 50 23 15–50 0.008d 20.0 (10.0–33.7) 0.47 (0.24–0.92) 0.45 (0.20–1.03)
  1. aAdjusted for patient age and co-morbidity (yes/no). Clusters are accounted for. bThe GPs who did not participate in CME or who did not work in a clinic with a GP who participated. cThe GPs participating in CME or working in a clinic with a participating GP. dDifferences between groups were tested by Wilcoxon test
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