|
|
We studied the disease status by question-naire in Seoul of the pupils in two primary schools on May, 1991 and carried out statistical analysis of their results.
The following results were observed:
1) Total number of answered pupil was 2330;1103 were male and 1227 were female and the ratio of male to female was 1:1.1. Average age was 9.27 years.
2) Number of... |