Table 5 Univariable analysis for cutoff points of Pulmonary Function tests and Pneumonitis
RTOG Scale | ||||||
PFT | Cutoff point | No Pneumonitis | Pneumonitis | HR | 95% CI | P value |
FEV1 | ˂1.9 | 5 (19.2%) | 4(36.4%) | 1.35 | 0.72–2.51 | 0.404 |
≥1.9 | 21 (80.8%) | 7 (63.6%) | ||||
FeNO | ˂18.5 | 17 (65.4%) | 1 (9.1%) | 1.99 | 1.22–3.24 | 0.003 |
≥18.5 | 9 (34.6%) | 10 (90.9%) | ||||
DLCO | ˂16.9 | 6 (23.1%) | 7 (63.6%) | 1.81 | 0.97–3.34 | 0.028 |
≥16.9 | 20 (76.9%) | 4 (36.4%) | ||||
CTCAE Scale | ||||||
PFT | Cutoff point | No Pneumonitis | Pneumonitis | HR | 95% CI | P value |
FEV1 | ˂1.9 | 2 (9.1%) | 7 (46.7%) | 3.21 | 0.93–11.16 | 0.017 |
≥1.9 | 20 (90.9%) | 8 (53.3%) | ||||
FeNO | ˂17.5 | 13 (59.1%) | 3 (20%) | 1.90 | 1.10–3.28 | 0.041 |
≥17.5 | 9 (40.9%) | 12 (80%) | ||||
DLCO | ˂18.9 | 7 (31.2%) | 12 (80%) | 2.26 | 1.21–4.22 | 0.007 |
≥18.9 | 15 (68.2%) | 3 (20%) | ||||