TABLE 6.

CTPF model-predicted 1-, 2-, and 3-year accumulative survive rate of patients at different CTPF stage.

CTPF stage	1-year cumulative survival rate%	2-year cumulative survival rate%	3-year cumulative survival rate %
I a	96.90	91.77	89.11
I b	94.15	84.83	80.20
I c	90.68	76.56	69.88
II a	92.79	81.51	76.02
II b	86.64	67.60	59.15
II c	79.23	52.96	42.63
III a	91.23	77.84	71.46
III b	83.89	61.90	52.55
III c	75.18	45.89	35.18

Notes: CTPF, stage: CTPF-based comprehensive stage. I a: CT, stage I and PF, grade a; I b: CT, stage I and PF, grade b; I c: CT, stage I and PF, grade c; II a: CT, stage II, and PF, grade a; II b: CT, stage II, and PF, grade b; II c: CT, stage II, and PF, grade c; III a: CT, stage III, and PF, grade a; III b: CT, stage III, and PF, grade b; III c: CT, stage III, and PF, grade c.

CT I: honeycomb lesion area was <5% of the entire lung. CT II: honeycomb lesion area was 5–25% of the entire lung. CT III: honeycomb lesion area was >25%. The PF-based grade was determined by assessing the scores of age, gender, FVC%pred, DLco%pred, and SpO₂% according to the criteria in Table 3 and adding the scores. PF (a): score 0–3. PF(b): score 4–6. PF(c): score 7–10.