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Table 2 Times to incident infections and incidence rates for different HPV genotypes and speciesa

From: Incident cervical infections with high- and low-risk human papillomavirus (HPV) infections among mothers in the prospective Finnish Family HPV Study

  Incident Infections Mean Time to 1st Incident Infection (months) Incident Rate (IR) per 1,000 women months at risk (wmr)
HPV Genotype: N % Actuarialb(95%CI) Crudec(95%CI) Actuarialb(95%CI) Crudec(95%CI)
HPV6 5 2.5 27.2 (9.2-45.2) 15.2(10.1-20.2) 0.8 (0.09-1.51) 65.9 (10.0-121.5)
HPV11 2 1.0 12.8 (12.2-13.4) 12.8(12.2-13.4) 0.3 (0.01-0.76) 78.2 (2.5-179.3)
HPV16 97 47.8 25.2 (22.0-28.3) 23.1(20.2-26.0) 15.6 (12.5-18.6) 43.3 (34.8-51.7)
HPV18 8 3.9 27.1 (13.8-40.3) 20.5(14.2-26.8) 1.3 (0.39-2.17) 48.7 (15.8-81.7)
HPV31 4 2.0 34.5 (7.4-61.6) 20.1(6.1-34.1) 0.6 (0.01-1.27) 49.8 (22.4-97.7)
HPV33 1 0.5 75.0 (75.0-75.0) 75.0(75.0-75.0) 0.2 (0.01-0.47) 13.3 (1.3-39.3)
HPV35 2 1.0 21.5 (7.7-35.3) 12.9(11.7-14.1) 0.3 (0.01-0.76) 76.9 (25.5-179.3)
HPV44 1 0.5 12.5 (12.5-12.5) 12.5(12.5-12.5) 0.2 (0.01-0.47) 80.0 (6.8-221.8)
HPV45 5 2.5 32.8 (13.9-51.6) 13.7(6.7-20.6) 0.8 (0.09-1.51) 72.4 (11.2-133.6)
HPV51 2 1.0 13.4 (0-35.7) 13.4(0-35.7) 0.3 (0.01-0.76) 74.1 (24.7-172.8)
HPV52 3 1.5 9.4 (2.0-16.8) 9.4(2.0-16.8) 0.5 (0.06-1.02) 107.1(7.4-221.7)
HPV56 2 1.0 25.4 (7.7-43.1) 42.4(0-101.0) 0.3 (0.01-0.76) 23.5 (8.6-55.7)
HPV58 4 2.0 29.0 (1.0-57.0) 13.5(4.1-22.8) 0.6 (0.01-1.27) 74.1 (42.2-143.9)
HPV59 3 1.5 17.0 (2.0-32.1) 17.0(1.9-32.1) 0.5 (0.06-1.02) 58.8 (5.8-123.4)
HPV66 2 1.0 7.6 (0-17.8) 7.6(0-17.8) 0.3 (0.01-0.76) 133.1 (38.2-305.0)
HPV70 6 3.0 11.2 (2.9-19.4) 6.3(2.0-10.6) 1.0 (0.19-1.73) 157.8 (41.9-273.8)
HPV73 2 1.0 7.6 (0-18.4) 7.6(0-18.4) 0.3 (0.01-0.76) 133.3 (38.7-305.3)
HPV82 3 1.5 9.4 (2.3-16.6) 9.4(2.3-16.6) 0.5 (0.06-1.02) 107.1 (74.1-221.7)
Multiple types 51 25.1 32.1 (26.2-37.9) 19.8(16.4-23.2) 8.2 (5.96-10.45) 50.5 (36.9-63.9)
HPV Species:       
Species 5 (26,51,69,82) 5 2.5 11.0 (2.7-19.3) 11.0(2.7-19.3) 0.8 (0.09-1.51) 90.9 (14.9-166.9)
Species 6 (30,53,56,66) 4 2.0 16.5 (3.5-29.4) 25.0(0-56.3) 0.6 (0.01-1.27) 40.0 (1.6-78.4)
Species 7 (18,39,45,59,68,70,85) 22 10.8 27.5 (17.3-37.7) 14.6(10.5-18.7) 3.5 (2.1-5.0) 68.5 (40.9-96.2)
Species 9 (16,31,33,35,52,58,67) 111 54.7 27.5 (23.3-31.7) 22.6(19.7-25.4) 17.9 (14.6-21.2) 44.3 (36.3-52.4)
Species 10 (6,11,13,44,55,74) 8 3.9 27.0 (11.0-42.9) 14.2(11.2-17.4) 1.3 (0.39-2.17) 70.2 (23.3-117.0)
Species 11 (34,73) 2 1.0 7.6 (0-18.4) 7.6(0-18.4) 0.3 (0.01-0.76) 133.3 (38.7-305.3)
  1. a among the 203 women of the Finnish Family HPV study who had an incident infection during the FU; ball baseline HPV-negative women at risk, months at risk calculated 1) until the first incident event, or 2) as total FU months for those with no incident event (Total wmr = 6,212); conly women with an incident event (months at risk calculated until the first incident event);