| Variables | Total cases | Cases with adequate collaterals | P values | |
| Gender | Males | 154 | 68 | 0.004 |
| Females | 46 | 09 | ||
| Degree of arterial obstruction | >90% | 90 | 46 | 0.019 |
| <90% | 110 | 37 | ||
| Age group | Above 50 years | 175 | 93 | 0.048 |
| Below 50 years | 25 | 8 | ||