Table 5.

Univariate analysis results regarding first late toxicities

	P-value	HR	95% CI
Age (years) >65/≤65	0.046	4.93	1.03–23.64
Initial field length (cm) >24.4/≤24.4	0.49	1.57	0.43–5.70
Boost field length (cm) >15.4/≤15.4	0.93	0.94	0.27–3.28
Sex male/female	0.99
Chemotherapy platinum containing/non-containing	0.41	2.63	0.26–2.63
Radiation dose (Gy) ≥60/<60	0.96	0.95	0.11–8.35
Location, Ut/lower than Ut	0.56	0.52	0.058–4.68

Ut = upper third of thoracic esophagus.