From logistic regression, we found that among methylation status, microsatellite instability and p53 mutation, there was a significant positive relationship only between infection and methylation status (OR = 3.78, p = 0.0075) and infection and p53 mutation (OR = 6.21, p = 0.0082); this shows that methylation status and p53 mutation are more correlated to infection than microsatellite instability (OR = 3.10, p = 0.19). The gene discussed is TP53; the disease is infection.