Number of human papilloma virus (HPV) DNA positive cases
| Type of HPV | |||||||
|---|---|---|---|---|---|---|---|
| 6 | 11 | 16 | 18 | Two types | Three types | Total | |
| The data for 1993 have been reported previously.5 | |||||||
| HPV double positive cases were as follows: in 1993, 13 cases were positive for HPV-16 and HPV-18, two were positive for HPV-6 and HPV-16, and another two for HPV-6 and HPV-18. In 1995, one was positive for HPV-6 and HPV-16, and three were positive for HPV-16 and HPV-18. In 1996, one each was positive for HPV-6 and HPV-18, and HPV-16 and HPV-18. In 1997, one was positive for HPV-16 and HPV-18. In 1998, no HPV double positive cases were found. | |||||||
| 1993 | 2 | 0 | 5 | 5 | 17 | 5 | 34 |
| 1995 | 5 | 6 | 5 | 3 | 4 | 0 | 23 |
| 1996 | 3 | 3 | 1 | 4 | 2 | 0 | 13 |
| 1997 | 0 | 2 | 1 | 1 | 1 | 0 | 5 |
| 1998 | 1 | 3 | 0 | 1 | 0 | 0 | 5 |