TABLE 6.

Hazard of Ceasing Mechanical Ventilation Associated With CCCs and Age

HR95% CI
Model 1*
Number of CCC categories
 01.00Referent
 10.620.570.67
 20.590.540.65
 3 or more0.580.510.66
Age at time of admission
 0–29 d1.00Referent
 1–11 mo1.010.891.16
 1–9 y1.301.141.47
 10–24 y1.151.021.31
Year
 19911.00Referent
 19941.070.991.17
 19971.110.961.31
Annual number of deaths
 <961.00Referent
 96–1171.020.911.14
 118–1501.100.941.29
 >1500.990.861.15
Model 2*
CCC categories
 None1.00Referent
 Respiratory0.490.440.54
 Malignancy0.770.630.95
 Hematologic or immunologic0.780.730.84
 Gastrointestinal0.780.650.93
 Cardiovascular0.780.670.91
 Metabolic0.790.730.85
 Neuromuscular0.910.801.04
 Other congenital or genetic1.010.901.15
 Renal1.331.121.60
  • * Model 1 also adjusted for gender and principal payer; model 2 also adjusted for age, gender, principal payer, year, and annual number of deaths in each hospital each year; both models used robust estimation of confidence interval based on clustering by hospital.