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. 2017 Aug 22;117(8):1121–1127. doi: 10.1038/bjc.2017.284

Table 2. Consent form return rates and whether consent was given for vaccination by school and trial arm (n=575).

  School number/arm
   
  Intervention arm
Standard invitation arm
   
  1 2 3 4 5 6 Intervention arm n/N (%, 95% CI) Standard invitation arm n/N (%, 95% CI)
Consent form returned 66 (97.1) 76 (100.0) 80 (72.1) 38 (39.6) 139 (78.5) 38 (80.8) 222/255 (87.1, 47.5–98.0) 215/320 (67.2, 34.6–88.8)
Consent given for vaccination 62 (91.2) 67 (88.2) 66 (59.5) 35 (36.5) 130 (73.5) 31 (65.0) 195/255 (76.5, 44.0–93.1) 196/320 (61.3, 32.4–83.9)