ssiexh27.htm Exhibit 27. Summary of missing dataValueNon-SSI PatientsSSI Patientsabx_dc1970 (8%)27 (11%)admit_src643 (3%)9 (4%)age642 (3%)13 (6%)asa18954 (76%)170 (72%)bmi4320 (17%)27 (11%)ca_hx*0 (0%)0 (0%)ch_kidney_dx*0 (0%)0 (0%)ch_lung_dx*0 (0%)0 (0%)copd_hx*0 (0%)0 (0%)diabetes*0 (0%)0 (0%)general_anes8 (0%)0 (0%)hypocholest*0 (0%)0 (0%)postop_hematocrit7597 (31%)40 (17%)postop_hemoglob9540 (38%)57 (24%)preop_albumin17468 (70%)143 (61%)preop_hematocrit10220 (41%)73 (31%)preop_hemoglob10709 (43%)79 (34%)preop_stay1002 (4%)14 (6%)rheum_dx*0 (0%)0 (0%)sex13 (0%)0 (0%)surg_dur614 (2%)13 (6%)wnd_class1128 (5%)34 (14%)* Unable to determine extent of missing data; original data dictionary instructed data abstractors to send specific ICD-9 codes if condition was present or leave blank if condition was not present.Return to Document Current as of December 2012 Internet Citation: ssiexh27.htm. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh27.html