Table 5. Factors affecting grade 2 or higher radiation pneumonitis.

Factors	Radiation pneumonitis (n = 8)	Univariate analysis (p)	Adjusted odds ratio (95% confidence interval)	Multivariate analysis (p)
Algorithm  RAT group  MC group	5/12 (41.7%) 3/23 (13.0%)	0.091	0.5 (0.1–3.9)	0.522
Treated targets  Single  Multiple	3/27 (11.1%) 5/8 (62.5%)	0.007	9.8 (1.3–76.5)	0.030
RT dose  48–50 Gy  60 Gy	0/5 (0.0%) 8/30 (26.7%)	0.315	n/a
Target size  ≤3 cm  >3 cm	5/19 (26.3%) 3/16 (18.8%)	0.700	n/a