Table 1 Demographic data of the study groups
| Group | PVB - group 1 - number (%) | TEA- group 2 -number (%) | Total number (%) |
|---|---|---|---|
| Age in years number of persons (%) | |||
| 20–50 | 3 (10) | 5 (16.7) | 8 (13.3) |
| 51–70 | 21 (70) | 19 (63.3) | 40 (66.7) |
| Above 70 | 6 (20) | 6 (20) | 12 (20) |
| Sex M/F | 21/9 (70/30) | 19/11 (63.3/36.7) | 40/20 (66.7/33.3) |