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Table 1 Estimated comparability ratios for 10 categories of CCC v2 classified by underlying cause of death ICD-9 and ICD-10 codes in the CDC Multiple Cause of Death data for 1996

From: Pediatric complex chronic conditions classification system version 2: updated for ICD-10 and complex medical technology dependence and transplantation

  Number allocated (N = 56,099)  
CCC categories ICD-9 ICD-10 Comparability ratio (95% CI) pvalue
Neurologic and neuromuscular 2,466 2,337 0.9477 (0.8967–1.006) 0.0571
Cardiovascular 3,423 3,397 0.9924 (0.9478–1.0391) 0.7453
Respiratory 1,447 1,378 0.9523 (0.8854–1.0243) 0.1886
Renal and urologic 356 369 1.0364 (0.8965–1.1984) 0.6281
Gastrointestinal 173 177 1.0231 (0.8300–1.2612) 0.8304
Hematologic or immunologic 691 724 1.0476 (0.9447–1.1621) 0.774
Metabolic 274 273 0.9963 (0.8429–1.1777) 1.000
Other congenital or Genetic defect 2,095 2,061 0.9838 (0.9268–1.0443) 0.591
Malignancy 2,443 2,549 1.0437 (0.9883–1.1016) 0.1249
Premature and neonatal 949 995 1.0485 (0.9600–1.1451) 0.2926
Technology dependence 6 6 1.0000 (0.3225–3.1004) 1.000
Transplantation 0 0 --- ---
CCC (Any CCC) 14,674 14,639 0.9976 (0.9782–1.0174) 0.8120
  1. The comparability ratio for any CCC category (CRc) is calculated as CR c  = Dc ICD-10/Dc ICD-9, where Dc ICD-10 is the number of deaths attributable to CCC category classified by ICD-10 and Dc ICD-9 is the number of deaths attributable to CCC category classified by ICD-9.