Seasonal Decomposition of Acute Respiratory Infection Time Series

Abstract

Seasonality in acute respiratory infections is a known phenomenon but in Swaziland there has been no studies to prove (highlight) it. The well-accepted X-11 methodology is used to decompose the monthly time series of respiratory infections from January 1990 to December 1997. The decomposition not only suggests strong seasonal effects and but also an increasing trend. Stability analysis were performed and they showed that the seasonally adjusted data is stable.

UNISWA Research Journal of Agriculture, Science and Technology Vol. 4 (1) 2000: pp 62-68