Table 1 Association of clinical factors and the risk of acute oral mucositis

Number of patients

349 (23.79%)

1118 (76.21%)

Age (Mean ± SD)

45.12 ± 10.71

45.18 ± 10.94

0.934

1.00

0.99–1.01

Gender

0.524

 Male

258

807

–

–

 Female

91

311

0.92

0.69–1.20

Clinical stage

0.047

 I–II

71

286

–

–

 III–IV

278

832

1.35

1.00–1.81

Tumor stage^a

0.035

 1–2

85

338

–

–

 3–4

264

780

1.35

1.02–1.77

Radiation technique

< 0.001

 2D-CRT

112

641

–

–

 IMRT

237

477

2.84

2.21–3.67

Treatment scheme

< 0.001

 RT alone

24

325

–

–

 RT + IC/AC

15

190

0.845

1.07

0.55–2.09

 CCRT

310

603

< 0.001

6.96

4.50–10.77