Interactions among variables affecting hospital utilization.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005006:Ethnicity; D005260:Female; D006761:Hospitals / Q000706:statistics & numerical data*; D006769:Hospitals, General / Q000706:statistics & numerical data; D006801:Humans; D007223:Infant; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D010414:Pennsylvania; D012044:Regression Analysis; D012494:Sampling Studies; D012737:Sex Factors; D013223:Statistics as Topic