Nine cases were observed in male children, but
only 2.9 were expected based on the average MA rate. Therefore, the SIR
= (9/2.9) x 100 = 312.
The 95% confidence interval for the SIR ranges from 104-519.
Female Children 1969-1979)
Age Group
Population
State Rate
Observed Cases
Expected Cases
<5
1714
0.0007
0
1.2
5-9
1982
0.0004
0
0.8
10-14
2083
0.0002
3
0.4
SUM
5779
----
3
2.4
Three cases were
observed in female children; 2.4 were expected based on the
average MA rate. Therefore, the
SIR = (3/2.4) x 100 = 125.
This was not statistically signficant.