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Table 3 Positive predictive value (PPV) of ICD-10-CM codes: Intentional self-harm treated in EDs

From: Multi-site medical record review for validation of intentional self-harm coding in emergency departments

 

Maryland

N = 225

Colorado

N = 246

Massachusetts

N = 367

n

%

n

%

n

%

PPV based on physician diagnosisa

202

89.8

226

91.9

357

97.3

PPV based on physician documentation or diagnosisa

229

97.9

242

98.4

363

98.9

PPV based on any documentationa

229

97.9

243

98.8

363

98.9

  1. Maryland: N = 225 (96.2%) of the 234 records eligible for review for the first definition of PPV and 234 (100%) for the second and third definitions of PPV. Colorado: N = 246 (94.6%) of the 260 sampled and Massachusetts N = 367 (91.8%) of 400 had completed reviews
  2. aReviewers requested and reviewed the full ED report, ambulance/EMT record (EMS transport record), face sheet, and toxicology reports. For all estimates of PPV, the denominator is all reviewed record in the random sample. For the first PPV, the numerator is limited to only records with physician diagnosis of intentional self-harm. For the second PPV, the numerator is the number of records with a physician diagnosis or other physician documentation in the medical record that would support a coder confirming an ICD-10-CM code for intentional self-harm. For the third PPV, the numerator is the number of records with any documentation in the medical record indicating intentional self-harm