Major causes of hospitalization (number of hospital discharges, in thousands), by age, 2002 (horizontal bar chart): Ages 1-4: Diseases of the respiratory system, 285; Endocrine, nutritional, and metabolic diseases and immunity disorders, 76; Infectious and parasitic diseases, 48; Diseases of the digestive system, 46; Injury, 44. Ages 5-9: Diseases of the respiratory system, 93; Diseases of the digestive system, 54; Injury, 40; Endocrine, nutritional, and metabolic diseases and immunity disorders, 33; Diseases of the skin and subcutaneous tissue, 33. Ages 10-14: Mental disorders, 115; Diseases of the digestive system, 70; Diseases of the respiratory system, 63; Injury, 58; Endocrine, nutritional, and metabolic diseases and immunity disorders, 41. Ages 15-19: Pregnancy/childbirth, 511; Mental disorders, 207; Diseases of the digestive system, 92; Injury, 85; Diseases of the respiratory system, 46; Diseases of the genitourinary system, 45. Ages 20-21: Pregnancy/childbirth, 444; Mental disorders, 85; Diseases of the digestive system, 41; Injury, 32; Diseases of the genitourinary system, 21.

Source: National Center for Health Statistics (2003). National Hospital Discharge Survey. Unpublished data.