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Table 2 Positive predictive values of cancer-related admissions categorized by indication for admission

From: Algorithm for analysis of administrative pediatric cancer hospitalization data according to indication for admission

Admission indication CCS category of primary diagnosis ICD-9 code Positive predictive value (95% confidence interval)
Malignancy N = 47,853 n (%) Chemotherapy toxicity N = 74,955 n (%) Infection N = 30,169 n (%) Non-infectious toxicityN = 40,725 n (%) Other N = 9,293 n (%) Reviewed True + False +
Intent-chemotherapy 6,985 (14.6%) 67,330 (89.8%) 1,428 (4.7%) 1,824 (4.5%) 224 (2.4%) 54,125# 53,932 193 99.6% (99.6–99.7%)
 N = 77,791
Intent-procedure 20,188 (42.2%) 1,585 (2.1%) 3,968 (13.2%) 3,258 (8.0%) 1,836 (19.8%) 45,855^ 45,249 606 98.7% (98.6–98.8%)
 N = 30,835
Intent-infection 3,017 (6.3%) 249 (<1%) 23,468 (77.8%) 3,646 (9.0%) - 28,887 28,255 632 97.8% (98.6–97.9%)
 N = 30,380
Non-infection toxicities 9,607 (20.1%) 499 (<1%) 1,305 (4.3%) 31,997 (78.6%) - 39,485 38,565 920 97.7% (97.5–97.8%)
 N = 43,408
Undefined 8,056 (16.8%) 5,292 (7.1%) - - 7,233 (77.8%)     
 N = 20,581          
  1. #Admissions associated with a date of chemotherapy delivery.
  2. ^Procedures.