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为了解日本血吸虫卵分布的性质，在均数ｍ较大时，利用回归方程ｌｇ（ｖ）＝ａ＋ｂｌｇ（ｍ）的回归系数ｂ是否接近２，来判断虫卵计数是否服从负二项分布。结果显示，日本血吸虫卵在阳性粪便中的分布、同一感染个体的虫卵计数在不同时间上的分布以及人群中虫卵计数分别在男女中的分布均可用负二项分布来描述，其回归系数ｂ的９５％可信区间分别为１．３０～２．３０、１．６１～１．９７、１．７１～２．１６、１．５５～２．２３。用实际资料配合负二项分布进行拟合优度检验，配合效果较好，亦从另一方面佐证了回归系数法（矩法）的可行性
In order to understand the nature of the egg distribution of Schistosoma japonicum, whether or not the egg count obeys the negative binomial distribution is determined by whether the regression coefficient b of the regression equation lg (v) = a + blg (m) is close to 2 when the average number m is large. The results showed that the distribution of Schistosoma japonicum eggs in positive stools, the distribution of egg count in the same infected individuals at different times, and the distribution of egg count in the population of men and women were all described by negative binomial distribution. The regression coefficient The 95% confidence intervals of b were 1.30-2.30, 1.61-1.97, 1.71-2.16, 1.55-2.23, respectively. With the actual data with the negative binomial distribution of goodness of fit test, with good results, but also on the other hand, the feasibility of regression coefficient method (Moment)