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Table 1 Impact of the POA indicator on observed rates of adverse events.

From: Impact of date stamping on patient safety measurement in patients undergoing CABG: Experience with the AHRQ Patient Safety Indicators

Patient Safety Indicators No. of Events Risk Pool 1-PPV Observed Rates per 1000 Discharges at Risk
  No POA POA No POA POA   No POA POA
Decubitus Ulcer 228 135 49,463 49,463 0.41 4.61† 2.73†
Failure to Rescue 403 324 3298 2,095 0.20 122.2† 154.7†
Infection due to Medical Care 374 349 72,954 72,954 0.07 5.13 4.78
Postop Hemorrhage or Hematoma 524 455 82,046 82,046 0.13 6.39† 5.55†
Postop Physiologic & Metabolic Derangement 191 153 35,003 35,003 0.20 5.46† 4.37†
Postop Embolism or DVT 512 343 82,040 82,040 0.33 6.24† 4.18†
Postop Sepsis 247 207 30,054 30,054 0.16 8.22¥ 6.89¥
Accidental Puncture or Laceration 961 848 82,050 82,050 0.12 11.71† 10.34†
  1. † P-value ≤ 0.05
  2. ¥ P-value = 0.06
  3. DVT – deep venous thrombosis, POA – present-on-admission indicator; PPV – positive predictive value; obs – observed; postop – postoperative