Volume 27, Number 1—January 2021
Synopsis
Impact of Human Papillomavirus Vaccination, Rwanda and Bhutan
Iacopo Baussano
, Felix Sayinzoga, Ugyen Tshomo, Vanessa Tenet, Alex Vorsters, Daniëlle A.M. Heideman, Tarik Gheit, Massimo Tommasino, Marie Chantal Umulisa, Silvia Franceschi, and Gary M. Clifford
, Felix Sayinzoga, Ugyen Tshomo, Vanessa Tenet, Alex Vorsters, Daniëlle A.M. Heideman, Tarik Gheit, Massimo Tommasino, Marie Chantal Umulisa, Silvia Franceschi, and Gary M. Clifford
Table 2
PRs and VE for positivity for human papillomavirus by GP5+/6+ PCR, Rwanda and Bhutan*
| Country and type of effectiveness | HPV type† | No. (%) by vaccination status |
Adjusted PRs (95% CI)‡ | Adjusted VE, % (95% CI)‡ | |
|---|---|---|---|---|---|
| Baseline survey | Repeat survey | ||||
| Rwanda | |||||
| Overall§ | All |
All |
|||
| No. | 912 | 1,087 | |||
| Vaccine-targeted | 23 (2.5) | 8 (0.7) | 0.22 (0.10 to 0.49) | 78 (51 to 90) | |
| Other α-9 | 26 (2.9) | 16 (1.5) | 0.42 (0.22 to 0.79) | 58 (21 to 78) | |
| Other α-7 | 19 (2.1) | 23 (2.1) | 0.82 (0.44 to 1.52) | 18 (–52 to 56) | |
| Non–α 7/9 | 24 (2.6) |
31 (2.9) |
0.85 (0.50 to 1.45) | 15 (–45 to 50) | |
| Restricted¶ | Unvaccinated |
All |
|||
| No. | 519 | 1,087 | |||
| Vaccine-targeted | 21 (4.0) | 8 (0.7) | 0.14 (0.06 to 0.31) | 86 (69 to 94) | |
| Other α-9 | 17 (3.3) | 16 (1.5) | 0.37 (0.19 to 0.74) | 63 (26 to 81) | |
| Other α-7 | 12 (2.3) | 23 (2.1) | 0.71 (0.35 to 1.43) | 29 (–43 to 65) | |
| Non–α 7/9 | 12 (2.3) |
31 (2.9) |
0.95 (0.49 to 1.85) | 5 (–85 to 51) | |
| Total# | Unvaccinated |
Vaccinated |
|||
| No. | 519 | 962 | |||
| Vaccine-targeted | 21 (4.0) | 3 (0.3) | 0.05 (0.01 to 0.17) | 95 (83 to 99) | |
| Other α-9 | 17 (3.3) | 15 (1.6) | 0.40 (0.19 to 0.81) | 60 (19 to 81) | |
| Other α-7 | 12 (2.3) | 19 (2.0) | 0.65 (0.31 to 1.37) | 35 (–37 to 69) | |
| Non–α 7/9 |
12 (2.3) |
25 (2.6) |
0.86 (0.43 to 1.71) |
14 (–71 to 57) |
|
| Bhutan | |||||
| Overall§ | All |
All |
|||
| No. | 973 | 909 | |||
| Vaccine-targeted | 8 (0.8) | 1 (0.1) | 0.12 (0.01 to 0.94) | 88 (6 to 99) | |
| Other α-9 | 27 (2.8) | 11 (1.2) | 0.37 (0.18 to 0.73) | 63 (27 to 82) | |
| Other α-7 | 26 (2.7) | 15 (1.7) | 0.49 (0.26 to 0.92) | 51 (8 to 74) | |
| Non–α 7/9 | 21 (2.2) |
18 (2.0) |
0.77 (0.41 to 1.42) | 23 (–42 to 59) | |
| Restricted¶ | Unvaccinated |
All |
|||
| No. | 77 | 909 | |||
| Vaccine-targeted | 2 (2.6) | 1 (0.1) | 0.04 (0 to 0.48) | 96 (52 to 100) | |
| Other α-9 | 2 (2.6) | 11 (1.2) | 0.44 (0.10 to 1.89) | 56 (–89 to 90) | |
| Other α-7 | 1 (1.3) | 15 (1.7) | 1.08 (0.15 to 7.82) | –8 (–682 to 85) | |
| Non–α 7/9 | 3 (3.9) |
18 (2.0) |
0.47 (0.14 to 1.59) | 53 (–59 to 86) | |
| Total# | Unvaccinated |
Vaccinated |
|||
| No. | 77 | 864 | |||
| Vaccine-targeted | 2 (2.6) | 1 (0.1) | 0.05 (0 to 0.51) | 95 (49 to 100) | |
| Other α-9 | 2 (2.6) | 10 (1.2) | 0.42 (0.10 to 1.81) | 58 (–81 to 90) | |
| Other α-7 | 1 (1.3) | 15 (1.7) | 1.13 (0.16 to 8.21) | –13 (–721 to 84) | |
| Non–α 7/9 | 3 (3.9) | 17 (2.0) | 0.46 (0.15 to 1.48) | 54 (–48 to 85) | |
*PR, prevalence ratio; VE, vaccine effectiveness. †Vaccine-targeted types (HPV-6, -11, -16, -18); other α-9 types (HPV-31, -33, -35, -52, -58); other α-7 types (HPV-39, -45, -59, -68); non–α 7/9 types (HPV-26, -51, -53, -56, -66, -70, -73, -82). ‡Adjusted for age, ever had sexual intercourse, and place of birth in Rwanda, and for ever had sexual intercourse only in Bhutan. §Entire baseline group compared with entire repeat group. ¶Unvaccinated baseline group compared with entire repeat group. #Unvaccinated baseline group compared with vaccinated repeat group.
Page created: November 03, 2020
Page updated: December 21, 2020
Page reviewed: December 21, 2020
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