APPENDIX 1.

Twenty Most Frequent DRG Codes for LTMV-Dependent Discharges in 2006 (Total Percentage Described: 67.18%)

Code	DRG Name (Version 24)	LTMV Discharges, %	95% CI
565	Respiratory system diagnosis with ventilatory support >96 h	16.0	14.1–17.9
566	Respiratory system diagnosis with ventilatory support <96 h	10.3	9.2–11.4
541	Extracorporeal membrane oxygenation or tracheostomy with mechanical ventilation >96 h for non-head and neck diagnoses with major operating room procedure	8.3	6.9–9.7
542	Tracheostomy with mechanical ventilation >96 h for non-head and neck diagnoses without major operating room procedure	4.9	4.2–5.5
386	Extreme immaturity or respiratory distress syndrome, neonate	2.6	1.8–3.5
26	Seizure and headache, age 0–17 y	2.5	2.0–3.0
385	Neonates, died or transferred to another acute care facility	2.2	1.7–2.8
91	Simple pneumonia and pleurisy, age 0–17 y	2.2	1.6–2.8
298	Nutritional and miscellaneous metabolic disorders, age 0–17 y	2.0	1.6–2.4
34	Other diseases of the nervous system with complications	1.8	1.3–2.2
98	Bronchitis and asthma, age 0–17 y	1.8	1.2–2.4
3	Craniotomy, age 0–17 y	1.7	1.2–2.1
101	Other respiratory system diagnosis with complications	1.6	1.1–2.1
76	Other respiratory system operating room procedure with complications	1.6	1.1–2.1
468	Extensive operating room procedure unrelated to principal diagnosis	1.5	1.1–1.9
190	Other digestive system diagnosis, age 0–17 Y	1.4	1.0–1.8
417	Septicemia, age 0–17 y	1.3	0.9–1.7
144	Other circulatory system diagnosis with Complications	1.2	0.9–1.6
184	Esophagitis, gastrointestinal, and miscellaneous digestive tract disorders, age 0–17 y	1.2	0.9–1.6
70	Otitis media and upper respiratory tract infection, age 0–17 y	1.1	0.8–1.4