KRT1 and diabetes mellitus: Carriage of K1 capsular type [Odds ratio (OR) 7.6, 95% confidence interval (95% CI) 2.49–23.194] and mucoviscosity-associated rmp A gene [OR 6.618, 95% CI 2.339–18.725], and diabetes mellitus [OR 4.857, 95% CI 1.744–13.528] were identified to remain independent risk factors having a substantial association to pks-positivity by multivariate regression analysis.