Table 3. Estimates of annual number of episodes of norovirus-associated diarrhea among children <5 years of age in industrialized and developing countries, by setting.

Setting	Annual no. diarrhea-associated events*	Pooled proportion of episodes attributable to noroviruses, %	Total no. norovirus episodes	Annual incidence per 100,000 children†‡
Industrialized countries†
Outpatient	7,743,000	11.7	906,000	1,665
Inpatient	531,000	12.1	64,200	118
Developing countries‡§
Inpatient	9,015,000	12.1	1,091,000	197
Deaths	1,800,000	12.1	218,000	39

*Refer to Methods section of article.
†Industrialized countries’ incidence based on UNICEF 2003 population estimates of 54,425,000 children <5 y of age in developing countries (www.unicef.org/sowc05/english/Developingregional.html).
‡Developing countries’ incidence based on UNICEF 2003 population estimates of 552,742,000 children <5 y of age in industrialized (www.unicef.org/sowc05/english/Industrializedregional.html)
§Data from developing countries were sparse on fraction of norovirus-associated diarrhea episodes in the outpatient setting.