Table 4 Severity score of PPCs
Variables | Non-ONN group(n = 432) | ONN group (n = 461) | χ2 | P-value |
|---|---|---|---|---|
PPCs severity score | Â | Â | 10.635 | 0.020 |
Grade 0 Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 | 367(85.0) 24(5.6) 32(7.4) 8(1.9) 1(0.2) 0 | 416(90.2) 9(2.0) 31(6.7) 5(1.1) 0 0 | Â | Â |
PPCs grade≥2 | 41(9.5) | 36(7.8) | 0.800 | 0.405 |
PPCs grade≥3 | 9(2.1) | 5(1.1) | 1.442 | 0.286 |