Table. Percentage of diarrhea hospitalizations attributable to rotavirus for countries in different World Bank income groups, 1986–1999 and 2000–2004.

Income group	Median % (interquartile range) of diarrhea-associated hospitalizations due to rotavirus
	1986–1999	2000–2004
Low	20 (16–27)	39 (28–45)
Low middle	25 (20–33)	40 (32–43)
High middle	31 (25–42)	38 (35–45)
High	34 (28–38)	44 (40–50)
Total*	21 (17–28)	39 (29–45)

*The overall median was calculated by taking a weighted average of the median rotavirus detection rate for each income group. The weights applied to each group corresponded to that group's proportion of global diarrheal deaths: 85% for low-income countries, 13% for low-middle–income countries, 2% for high-middle–income countries, and <1% for high-income countries.