Table 3 Correlation between diameter of PFO and ischemia lesion positivity
From: The correlation between patent foramen ovale and brain ischemia in plateau residents
PFO diameter | Ischemia lesion, n (%) | Test | χ2 | P value | |
|---|---|---|---|---|---|
Yes | No | ||||
PFO ≥ 4 mm | 37 (94.9) | 2 (5.1) | Chi-square test for trend | 24.22 |  < 0.001 |
4 mm ≥ PFO > 2 mm | 24 (68.6) | 11 (31.4) |  |  |  |
PFO < 2 mm | 10 (38.5) | 16 (61.5) |  |  |  |
sum | 71 (71.0) | 29 (29.0) | Â | Â | Â |