Dracontiasis in Madhya Pradesh II. Statistical analysis on incidence in Arnnhaydhani, a highly endemic village.

1. The village of Arnnhyadhani [District Mandsour] with a total population of 195 was found to be a highly endemic pocket with 40% [78 persons] infection. 2. Statistically, infection rate was found to be maximum at the modal age of 22.91 years after which it decreases. A positive skewness [0.05] supports this finding. 3. A larger percentage of males [48.03%] with the infection taking place late [23.69 years] were found to be infected in comparison to females [31.18%] who get the infection at an earlier [18 years] age. 4. Coefficient of variation [V] test showed that males were nearer to mean [V = = 49.90 than females = 59.83]. 5. The proportion tests Z value was found to be 2.69 [Rewat caste] which was found to be greater than the standard value [1.96] at 5% level; concluded that infection was significant on sex [males]. 6. Infection dependence on caste [Rewat caste] was found out by the chi-square test whose X2 value of 27.654.