Table 1. Prevalence ratio of cervical neoplasia by history of electrodiathermy coagulation, Finland, 1963–1972, Kauraniemi et al 1978 [13].
| Malignancy | Electrodiathermy coagulation Yes N (%) | Electrodiathermy coagulation No N (%) | Prevalence ratio1 | 95% Confidence intervaI1 |
|---|---|---|---|---|
| Normal | 67 222 (99.9) | 360 417 (99.4) | 1.02 | – |
| Dysplasia levis | 33 (0.05) | 451 (0.12) | 2.5 | 1.8–3.6 |
| Severe Dysplasia | 25 (0.04) | 554 (0.15) | 4.1 | 2.8–6.2 |
| Carcinoma in situ | 34 (0.05) | 791 (0.22) | 4.3 | 3.1–6.1 |
| Microinvasive | 0 (0.00) | 60 (0.02) | ∞ | 2.9–∞ |
| Invasive carcinoma | 7 (0.01) | 238 (0.07) | 6.3 | 3.0–13.4 |
| Total | 67 321 | 362 511 |
1
Calculated from Table IV in Kauraniemi et al 1978.
2
Reference category