Table 1 Risk of developing anal and perianal skin cancer (n=28) according to the presence of igG antibodies to different human papillomavirus (HPV) types; case – cohort design*

From: Erratum: Human papillomavirus infection as a risk factor for anal and perianal skin cancer in a prospective study

 

% Positive

Without adjustment for the other HPV types

With adjustment for the other HPV types

HPV type

Cases (n=28)

Controls (n=1500)

OR

95% CI

OR

95% CI

HPV 16a

29

8

3.7

1.5–9.5

3.6

1.3–10

HPV 18b

18

7

2.9

0.9–9.2

2.9

0.8–10

HPV 33b

21

11

1.5

0.5–4.3

1.0

0.3–3.2

HPV 16, 18 or 33

50

19

4.0

1.7–9.4

4.5

1.9–11

HPV 73b

4

7

0.4

0.1–3.1

0.3

0.0–2.1

  1. aHPV 16: cut-off level, 354.
  2. bHPV 18, 33 and 73: cut-off level, 100.
  3. Sex (two categories), age (three categories), time of serum sampling (four categories) and serum bank/area of residence (five categories; Finland, Oslo county, Finnmark county, other Norwegian counties and Red Cross blood donors) were adjusted for in all models.
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