The aim of the present study was to examine whether school performance
is influenced by absence because of illness and if there are any diff
erences in the relationship due to grade, sex, and season of birth. Da
ta were taken for 598 pupils born in 1947 whose complete records for t
he Ist through 6th grades were stored at the city archive of Uppsala.
Simple correlational analyses were conducted between spring absence du
e to illness in the 2nd through 6th grades and teacher-assigned grades
during the same spring for verbal and arithmetic performance. Signifi
cant negative correlations were found between absence and both arithme
tic and verbal performance in Grades 5 and 6. Subgroup analysis reveal
ed significant correlations for the girls in the 5th grade and for boy
s in the 6th grade. However, only girls and boys born during the first
half of the year showed these significant correlations between absenc
e due to illness and performance.