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Exhibit 28. Count of missing values (with percentage)

Procedurepostop_
hematocrit
postop_
hemoglob
preop_
albumin
preop_
albumin
preop_
hemoglob
DH     
HE429 (46.4%)429 (46.4%)489 (52.9%)340 (36.8%)345 (37.3%)
TH47 (17.3%)47 (17.3%)127 (46.9%)70 (25.8%)70 (25.8%)
TK31 (13.2%)32 (13.7%)99 (42.3%)41 (17.5%)41 (17.5%)
IH     
AP3923 (64%)3949 (64.5%)2784 (45.4%)1568 (25.6%)1672 (27.3%)
CA80 (4.4%)81 (4.5%)418 (23.2%)123 (6.8%)128 (7.1%)
HE1690 (77.8%)1703 (78.4%)2173 (100%)1424 (65.5%)1682 (77.4%)
TH85 (2.9%)514 (17.7%)2478 (85.2%)1249 (42.9%)1334 (45.8%)
TK615 (6.9%)1817 (20.3%)7697 (86.2%)4511 (50.5%)4549 (50.9%)
VA     
CA78 (100%)78 (100%)1 (1.3%)78 (100%)78 (100%)
HE202 (85.2%)237 (100%)90 (38%)22 (9.3%)22 (9.3%)
TH (0%)90 (100%)49 (54.4%)1 (1.1%)1 (1.1%)
TK1 (0.6%)163 (100%)95 (58.3%)3 (1.8%)3 (1.8%)
VAIL     
HE388 (92.8%)390 (93.3%)418 (100%)337 (80.6%)336 (80.4%)
TH13 (8.2%)12 (7.5%)159 (100%)107 (67.3%)107 (67.3%)
TK55 (10.3%)55 (10.3%)534 (100%)419 (78.5%)420 (78.7%)

DH = Denver Health; IH = Intermountain Healthcare; VA =Salt Lake City VA Vail = Vail Valley Medical Center; AP = Appendectomy; CA = CABG; HE = Herniorrhaphy; TH = Total Hip Arthroplasty; TK = Total Knee Arthroplasty

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Current as of December 2012
Internet Citation: Exhibit 28. Count of missing values (with percentage). December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh28.html