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. 2019 Apr 3;365:l1161. doi: 10.1136/bmj.l1161

Table 3.

Cytological and histological abnormalities at age 20 by age at first dose of bivalent human papillomavirus vaccine and immunisation status. Values are adjusted odds ratios (95% confidence intervals) unless stated otherwise

Age groups and dose Years to first screen No Borderline changes Low grade dyskaryosis High grade dyskaryosis CIN grade
Moderate Severe 1 2 3 or worse
All: 1 dose 2051 0.94 (0.81 to 1.08) 1.27 (1.05 to 1.53) 0.89 (0.58 to 1.37) 1.02 (0.59 to 1.75) 0.94 (0.53 to 1.68) 0.95 (0.56 to 1.59) 1.19 (0.70 to 2.05)
All: 2 doses 4135 0.94 (0.85 to 1.04) 1.09 (0.94 to 1.26) 0.91 (0.67 to 1.24) 0.62 (0.38 to 1.00) 0.70 |(0.43 to 1.12) 0.70 (0.45 to 1.07) 0.77 (0.48 to 1.24)
3 doses:
 12 and 13 7 or 8 16 200 0.58 (0.54 to 0.62) 1.38 (1.28 to 1.48) 0.20 (0.15 to 0.28) 0.07 (0.03 to 0.14) 0.22 (0.14 to 0.34) 0.11 (0.06 to 0.19) 0.14 (0.08 to 0.25)
 14 6 5409 0.55 (0.50 to 0.62) 1.37 (1.22 to 1.53) 0.26 (0.16 to 0.42) 0.23 (0.11 to 0.46) 0.48 (0.29 to 0.79) 0.13 (0.05 to 0.31) 0.18 (0.07 to 0.43)
 15 5 16 532 0.59 (0.55 to 0.63) 1.31 (1.22 to 1.41) 0.36 (0.28 to 0.47) 0.28 (0.20 to 0.41) 0.48 (0.36 to 0.65) 0.35 (0.25 to 0.48) 0.29 (0.19 to 0.44)
 16 4 17 511 0.75 (0.71 to 0.80) 1.05 (0.97 to 1.13) 0.35 (0.27 to 0.45) 0.25 (0.17 to 0.37) 0.58 (0.44 to 0.77) 0.31 (0.23 to 0.44) 0.27 (0.18 to 0.41)
 17 3 8711 0.86 (0.80 to 0.93) 0.77 (0.96 to 0.86) 0.60 (0.46 to 0.78) 0.42 (0.27 to 0.63) 0.59 (0.41 to 0.86) 0.45 (0.30 to 0.66) 0.55 (0.36 to 0.83)
 ≥18 2 4117 0.98 (0.89 to 1.08) 0.80 (0.68 to 0.94) 0.65 (0.45 to 0.93) 0.88 (0.58 to 1.35) 0.79 (0.50 to 1.25) 0.75 (0.48 to 1.15) 0.85 (0.52 to 1.37)
≥1991: 0 doses 15678 0.89 (0.84 to 0.94) 1.41 (1.31 to 1.52) 0.84 (0.70 to 1.01) 0.90 0.71 to 1.14) 0.62 (0.47 to 0.82) 0.81 (0.65 to 1.02) 0.82 (0.63 to 1.07)
1988-90: 0 doses 48 348 1.00 1.00 1.00 1.00 1.00 1.00 1.00

CIN=cervical intraepithelial neoplasia.

Estimates derived from multinomial regression model adjusting also for deprivation and rurality. Estimated effects of these variables were similar to those in supplementary table 1 and are not repeated here.