| Group (A) (n = 25) | Group (B) (n = 25) | Group (C) (n = 25) | |
Age (years) | Mean ± S.D. | 53.9 ± 8.3 | 51.4 ± 8.1 | 52.5 ± 6.6 |
Sex | Male (n = 56) | 23 (92%) | 13 (52%) | 20 (80%) |
Female (n = 19) | 2 (8%) | 12 (48%) | 5 (20%) |