Table 2 Demographic characteristics of the studied groups.
Number of patients | Age | Proportion of women | Treated between (ys) | 80% of treatments performed between (ys) | ||
|---|---|---|---|---|---|---|
Range | Mean | |||||
Group I | 247 | 22-85 | 59 | 53% | 1978-2001 | 1989-1999 |
Group II | 737 | 20-88 | 62 | 50% | 1968-2002 | 1984-1999 |
Group III | 835 | 22-87 | 63 | 49% | 1980-1998 | 1984-1994 |
Reference group (unilateral) | 8402 | 20-94 | 65 | 51% | 1982-2000 | 1985-1998 |