MLE based on EM algorithm is robust for par ameter estimation of GLM based on Gamma distribution with interval data. GLM meth od can be used to explore factors that influencing SARS incubation period with i nterval data.

• 基于EM算法的MLE方法对于含区间数据Gamma分布GLM参数的估计是强健的,GLM方法可以用于含区间数据SARS潜伏期的影响因素分析。