Table 3 Comparison of the pathological characteristics between I-DiPO and S-DiPO by type and grading.
Pathological type | Underlying diseases | No. of nodular type | No. of mixed type | No. of dendriform type | No. of dendriform type/all types | % | F test P value | Â |
---|---|---|---|---|---|---|---|---|
 | Idiopathic | 0 | 5 | 13 | 13/18 | 72.2 |  |  |
Secondary-All | 2 | 2 | 3 | 3/7 | 42.8 | NS | Â | |
Secondary-Af | 2 | 1 | 0 | 0/3 | 0 | < 0.05 |  |
Characteristic | Underlying diseases | No. of G0 | No. of G1 | No. of G2 | No. of G3 | No. of G2 + 3/all grades | % | F test P value |
---|---|---|---|---|---|---|---|---|
Ossification characteristic | Â | Â | Â | Â | Â | Â | Â | Â |
 With bone marrow grade | Idiopathic | 1 | 2 | 12 | 3 | 15/18 | 83.3 |  |
Secondary-All | 2 | 2 | 2 | 1 | 3/7 | 42.8 | NS | |
Secondary-Af | 2 | 1 | 0 | 0 | 0/3 | 0 | < 0.05 | |
 Ossification MAX size grade | Idiopathic | 0 | 1 | 11 | 6 | 17/18 | 94.4 |  |
Secondary-All | 1 | 2 | 2 | 2 | 4/7 | 57.1 | < 0.05 | |
Secondary-Af | 2 | 1 | 0 | 0 | 0/3 | 0 | < 0.05 | |
Fibrosis | Â | Â | Â | Â | Â | Â | Â | Â |
 Subpleural fibrosis grade | Idiopathic | 17 | 1 | 0 | 0 | 0/18 | 0 | < 0.01 |
Secondary | Â | 2 | 3 | 2 | 5/7 | 71.4 | ||
 OP grade | Idiopathic | 15 | 3 | 0 | 0 | 0/18 | 0 | < 0.05 |
Secondary | 2 | 2 | 0 | 3 | 3/7 | 42.8 | ||
 Cicatricial OP (CiOP-grade) | Idiopathic | 1 | 6 | 9 | 2 | 11/18 | 61.1 | NS |
Secondary | 0 | 2 | 3 | 2 | 5/7 | 71.4 |