1. Infectious and parasitic
- 1997 cost — $6.6 billion
- 2007 cost — $15.3 billion
- Average annual growth rate — 8.8 percent
2. Musculoskeletal
- 1997 cost — $11.8 billion
- 2007 cost — $26.8 billion
- Average annual growth rate — 8.5 percent
3. Skin
- 1997 cost — $2.4 billion
- 2007 cost — $4.8 billion
- Average annual growth rate — 7.2 percent
4. Blood
- 1997 cost — $1.8 billion
- 2007 cost — $3.5 billion
- Average annual growth rate — 6.7 percent
5. Endocrine system
- 1997 cost — $5.8 billion
- 2007 cost — $10.0 billion*
- Average annual growth rate — 5.6 percent
5. Nervous system
- 1997 cost — $3.9 billion
- 2007 cost — $6.7 billion
- Average annual growth rate — 5.6 percent
7. Genitourinary
- 1997 cost — $8.1 billion
- 2007 cost — $13.5 billion
- Average annual growth rate — 5.3 percent
8. Injury and poisoning
- 1997 cost — $23.0 billion
- 2007 cost — $37.2 billion
- Average annual growth — 4.9 percent
9. Perinatal (newborns)
- 1997 cost — $9.7 billion
- 2007 cost — $15.5 billion
- Average annual growth — 4.8 percent
10. Pregnancy and childbirth
- 1997 cost — $12.2 billion
- 2007 cost — $18.8 billion
- Average annual growth — 4.4 percent
10. Digestive
- 1997 cost — $20.8 billion
- 2007 cost — $32.0 billion
- Average annual growth — 4.4 percent
10. Mental
- 1997 cost — $7.9 billion
- 2007 cost — $12.2 billion*
- Average annual growth — 4.4 percent
*Costs are not statistically different from 2002 (the previously reported year) at P 0.05.
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