an increasing trendP < 0.001
According to the Chi-squared test for trend in proportions, it was observed that the incidence rate showed an increasing trend with increasing of TST reaction size (chi-squared = 24.037, P < 0.001).
According to the Chi-squared test for trend in proportions, it was observed that the incidence rate showed an increasing trend with increasing of TST reaction size (chi-squared = 24.037, P < 0.001).