| Demographic data | All patients | Group 1 (Normal) | Group 2 (Non-obstructive) | Group 3 (Obstructive) | Test | p-value (Sig.) |
| Count (%) | 70 (100%) | 20 (28.6%) | 25 (35.7%) | 25 (35.7%) | ||
| Sex |
|
| ||||
| Male | 45 (64.3%) | 8 (40%) | 15 (60%) | 22 (88%) | 11.64‡ | 0.003 (S) |
| Female | 25 (35.7%) | 12 (60%) | 10 (40%) | 3 (12%) | ||
| Age (years) |
|
| ||||
| Mean ± SD | 50.6 ± 9.3 | 44.6 ± 9.3●● | 54.9 ± 7.5 | 51.2 ± 8.6 | 8.43₳ | 0.001(S) |
| Range | 24 - 67 | 24 - 58 | 41 - 67 | 32 - 67 | ||
| HTN |
|
| ||||
|
| 32 (45.7%) | 5 (25%) | 13 (52%) | 14 (56%) | 4.92‡ | 0.085 (NS) |
| DM |
|
| ||||
|
| 19 (27.1%) | 1 (5%) | 10 (40%) | 8 (32%) | 7.35‡ | 0.025 (S) |
| Dyslipidemia |
|
| ||||
|
| 10 (14.3%) | 2 (10%) | 2 (8%) | 6 (24%) | 3.03‡ | 0.219 (NS) |
| Obesity |
|
| ||||
|
| 28 (40%) | 9 (45%) | 11 (44%) | 8 (32%) | 1.04‡ | 0.594 (NS) |
| Smoking |
|
| ||||
|
| 15 (21.4%) | 2 (10%) | 5 (20%) | 8 (32%) | 3.24‡ | 0.198 (NS) |
| Family history |
|
| ||||
|
| 3 (4.3%) | 1 (5%) | 1 (4%) | 1 (4%) | 0.035‡ | 0.983 (NS) |