Table 3. Correlation analysis between side effects and LDR in patients who have received previous radiotherapy.

		Previous RT
		LDR group	No LDR group
Dermatitis	x 2	0.885	0.849
	p	0.347	0.033
Soft tissue injury	x 2	0.147	8.617
	p	0.929	0.035
Granulocytopenia	x 2	13.677	9.502
	p	0.003	0.050
Anemia	x 2	3.659	1.530
	p	0.301	0.675
Thrombocytopenia	x 2	0.529	0.707
	p	0.409	0.815
Swallowing discomfort	x 2	6.518	4.523
	p	0.011	0.104
Nausea	x 2	7.222	7.583
	p	0.007	0.023

Note:

LDR, low-dose radiation; RT, radiation therapy.