[Establishment of early warning control charts based on the syndromic surveillance data of outpatient diarrhea in Beijing].

OBJECTIVE

To establish the control charts for early warning of diarrhea based on the syndromic surveillance data from enteric clinic in Beijing.

METHODS

The outpatient data from enteric clinic of a Grade Three General hospital in Haidian district, Beijing from April 1 to Oct. 31, 2009 and from May 1 to Nov.10, 2010 were collected, according to the moving average method, the baseline calculated, the value of probability α and μα, the early warning value based on the formula "w=Xj+μαSj" calculated and the early warning control charts drew at last.

RESULTS

According to the harmfulness, the severity and controllability of diarrheal diseases, the value of probability α was determined as 0.01, then μα (unilateral) as 2, based on the early warning value, the control charts of diarrheal diseases, bacillary dysentery and other infectious diarrhea were established.

CONCLUSION

The enteric clinic requires to further collect baseline data to evaluate and continuously adjust the established control charts for the best early warning model in accordance with the enteric clinic.