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Table 4 Comparison of findings in between broad and narrow categories with comparison studies

From: Which ICD-9-CM codes should be used for bronchiolitis research?

  Diagnosis Subject source Age limit (months) Study numerator Study denominator %
Fever Broad All 24 25,514 48,269 52.9
Broad All 12 19,107 35,645 53.6
Narrow All 24 20,439 22,781 89.7
Narrow All 12 15,638 17,474 89.5
Walsh 2004 [11] Inpatient 24 28 118 23.7
Chee 2010 [12] ED 18 206 640 32.6
Plint 2004 [8] ED 12 75 237 31.6
Ecochard-Dugelay [13] ED 24 448 821 54.5
Gender Broad All 24 26,638 48,269 55.2
Broad All 12 19,713 35,645 55.3
Narrow All 24 11,909 22,781 52.3
Narrow All 12 9189 17,474 52.3
Walsh 2004 [11] Inpatient 24 70 118 59.1
Chee 2010 [12] ED 18 371 640 57.97
Corneli [14] ED 12 368 598 61.5
Plint [8] ED 12 140 237 59.1
Age     Study N Mean Median
Broad All 24 48,269 8.7 7.4
Broad All 12 35,645 5.8 6.0
Narrow All 24 22,781 8.3 7.0
Narrow All 12 17,474 5.9 5.6
Walsh 2004 [11] Inpatient 24 118 6.0  
Chee 2010 [12] ED 18 640 6.4 4.8
Corneli [14] ED 12 598   5.1
Plint 2004 [8] ED 12 237   5.0
Plint 2009 [15] ED 12 800   5.0
  1. Comparison of findings in between broad and narrow diagnosis codes with comparison studies which did not rely on ICD coding for subject inclusion. ED; emergency department