Table 4 Incidence and distribution of carotid stenosis in 2D-RT and IMRT group.

From: Comparison of Significant Carotid Stenosis for Nasopharyngeal Carcinoma between Intensity-Modulated Radiotherapy and Conventional Two-Dimensional Radiotherapy

Stenotic artery

2D-RT (%)

IMRT (%)

X2

p-Value

n = 96

n = 137

Common carotid artery

21 (21.9)

15 (11.0)

5.158

0.024

Internal carotid artery

17 (17.8)

12 (8.8)

4.148

0.042

Carotid bulb

17 (17.8)

11 (8.1)

5.002

0.026

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