Table 1. Baseline and follow-up characteristics of 8,856 patients involved in our population-based study.
| Characteristics | Parameters | Values |
|---|---|---|
| Age (yr) | Median | 37 (18–88) |
| 25th–75th percentile | 32–42 | |
| <20 | 14 (0.2) | |
| 20–29 | 1,373 (15.5) | |
| 30–39 | 4,203 (47.5) | |
| 40–49 | 2,485 (28.1) | |
| 50–59 | 487 (5.5) | |
| 60–69 | 210 (2.4) | |
| >70 | 84 (0.9) | |
| Gravidity | Median | 2 (0–13) |
| 25th–75th percentile | 0–3 | |
| Parity | Median | 1 (0–9) |
| 25th–75th percentile | 0–2 | |
| Menopausal status | Premenopausal | 8,182 (92.4) |
| Postmenopausal | 674 (7.6) | |
| Punch biopsy (diagnosis before conization) | CIN 1 or CIN 2 | 536 (6.1) |
| CIN 3 | 8,108 (91.6) | |
| Cervical cancer stage IA | 158 (1.8) | |
| Cervical cancer stage IB or higher | 9 (0.1) | |
| Adenocarcinoma in situ | 16 (0.2) | |
| Others | 29 (0.3) | |
| Type of treatment procedure | Ultrasonic scalpel conization | 2,463 (27.8) |
| Electrical scalpel conization | 2,151 (24.3) | |
| Laser scalpel conization | 1,526 (17.2) | |
| LEEP | 1,324 (15.0) | |
| S-T conization | 1,024 (11.6) | |
| Cold knife and other methods | 368 (4.2) | |
| Surgical margin status | Positive | 1,271 (14.4) |
| Negative | 7,585 (85.6) | |
| Complications after conization | Yes | 176 (2.0) |
| No | 8,680 (98.0) | |
| Additional treatment after conization | Yes | 294 (3.3) |
| No | 8,562 (96.7) | |
| Recurrence | Yes | 395 (4.5) |
| No | 8,461 (95.5) | |
| Follow-up period | Median | 28 (0–92) |
| 25th–75th percentile | 15–39 |
Values are presented as median (interquartile range) or number (%).
CIN, cervical intraepithelial neoplasia; LEEP, loop electrosurgical excision procedure; S-T, Shimodaira-Taniguchi.