Table 6

Hospitalization Rates in the Control Sample

0-9 years of age

10-19 years of age


Including controls with malformations

Excluding controls with malformations

Including controls with malformations

Excluding controls with malformations


Number of observations

618,082

586,874

343,797

326,991


Hospitalized at least once

54,562 (8.83%)

48,280 (8.23%)

16,967 (4.94%)

15,791 (4.83%)


Hospitalization days among those hospitalized

5.23 (11.37)

4.68 (9.73)

3.88 (9.27)

3.83 (9.39)


Note: The Table reports crude (unadjusted) hospitalization rates and average length of stay in the control sample born between 1977 and 2002 when including and excluding individuals with birth defects. The frequency of those hospitalized is reported with the percentage in parenthesis. The mean of hospitalization days is reported with the standard deviation in parenthesis.

Wehby et al. BMC Health Services Research 2012 12:58   doi:10.1186/1472-6963-12-58

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