Table 4 Correlation between diameter of PFO and characteristics of ischemia lesion
From: The correlation between patent foramen ovale and brain ischemia in plateau residents
Ischemia lesion characteristics | PFO ≥ 4 mm (n = 37) | 4 mm ≥ PFO > 2 mm (n = 24) | PFO < 2 mm (n = 10) | Test | χ2 | P value |
|---|---|---|---|---|---|---|
Location, n (%) | Â | Â | Â | Chi-square test | 0.974 | 0.614 |
 Unilateral | 28 (75.7) | 17 (70.8) | 6 (60.0) |  |  |  |
 Bilateral | 9 (24.3) | 7 (29.2) | 4 (40.0) |  |  |  |
Left or right hemispheres, n (%) | Â | Â | Â | Chi-square test | 0.895 | 0.639 |
 Left | 16 (43.2) | 13 (54.2) | 4 (40.0) |  |  |  |
 Right | 21 (56.8) | 11 (45.8) | 6 (60.0) |  |  |  |
Number, n (%) | Â | Â | Â | Chi-square test | 9.655 | 0.008 |
 Single | 12 (32.4) | 15 (62.5) | 8 (80.0) |  |  |  |
 Multiple | 25 (67.6) | 9 (37.5) | 2 (20.0) |  |  |  |
Circulation, n (%) | Â | Â | Â | Chi-square test | 0.825 | 0.662 |
 Anterior | 20 (54.1) | 14 (58.3) | 7 (70.0) |  |  |  |
 Posterior | 17 (45.9) | 10 (41.7) | 3 (30.0) |  |  |  |