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. 2008 Jul 7;14(25):4082–4086. doi: 10.3748/wjg.14.4082

Table 1.

Sequential change of positive rate of serum p53-Abs in EC patients before and after radiotherapy

Groups n - + % χ2 P
Before RT 46 28 18 39.1 0.000 1.0001
20 Gy 46 28 18 39.1 0.187 0.6662
40 Gy 46 30 16 34.8 4.696 0.0303
60 Gy 46 39 7 15.2 6.646 0.0104
1

Before RT vs 20 Gy;

2

Before RT vs 40 Gy;

3

40 Gy vs 60 Gy;

4

Before RT vs 60 Gy.