Appendix L. Final data sheet submitted by each site that included the list of potential SSI risk factors and other pertinent variables

11/Aug/2010

Column Heading	Value Type	Description	Typei
Admit_src	Character	Source of admissionii	E
Icu_admit	Numeric	1 if admitted from OR to ICU, else 0	E
Inpat_surg	Numeric	1 if inpatient surgery, else 0	E
Outpat_surg	Numeric	1 if outpatient surgery, else 0	E
Age	Numeric (yrs)	Patient age, years	P
BMI	Numeric	Body Mass Index before surgery	P
CA_hx	Numeric	Listed ICD9 codeiii w/ decimal, for the disease, else 0	P
ch_kidney_dx	Character	Listed ICD9 codeiii, w/ decimal, for the disease, else 0	P
ch_lung_dx	Character	Listed ICD9 codeiii, w/ decimal, for the disease, else 0	P
COPD_hx	Numeric	Listed ICD9 codeiii, w/ decimal, for the disease, else 0	P
diabetes	Character	Listed ICD9 codeiii, w/ decimal, for the disease, else 0	P
DVT	Numeric	1 if pat. developed DVT related to surgery within 90days	P
Hypocholest	Character	Listed ICD9 codeiii, w/ decimal, for the disease, else 0	P
MRSA	Numeric	Hx of MRSA	P
Patid	Numeric	Random or sequential de-identified number with prefixiv	P
Payer	Numeric	Payer/insurance type (govt=2, nongovt=1, none=0)	P
Postop_hematocrit	Numeric	First hematocrit value after surgery	P
Postop_admit	Numeric	Hospital admission after surgery within 30 days=1, else 0	P
Preop_hematocrit	Numeric	Latest hematocrit value just before surgery	P
Preop_hemoglob	Numeric	Latest hemoglobin value just before surgery	P
Postop_hemoglob	Numeric	First hemoglobin value after surgery	P
Preop_stay	Numeric (days)	Days from admission to surgery start day	P
Proeop_albumin	Numeric	Last albumin value before surgery start time	P
Rheum-dx	Character	Listed ICD9 codeiii, w/ decimal, for the disease, else 0	P
Sex	Character	M or F	P
SSI	Numeric	1 if pat. had a SSI as a result of this surgery, else 0	P
Abx_dc	Numeric	1 if yes…0 if no*	S
ASA	Numeric	ASA score	S
Emergent	Numeric	1 if emergency surgery, else 0	S
General_anes	Numeric	1 if yes…0 if no	S
No_procedures	Numeric (count)	Number of procedures during same operation	S
Surg_date/time	Date	Date and time of surgery	S
Surg_dur	Numeric	Surgery duration, minutes	S
Surg_proc	Character	Surgical procedure (TH, TK, CA, HE, AP)	S
Surgeon_ex	Numeric (yrs)	Number of years surgeon has been practicing	S
Wnd_class	Numeric	1-4	S

* Abx d/c within 48 hrs for CABG and within 24 hrs for TH, TK, HE, AP

ⁱ E = environmental factor, P = patient specific, S = surgery specific.
ⁱⁱ Refer to Admission_Source_Table
ⁱⁱⁱ Refer to SSI Risk Tool Comorbidities ICD9 Codes table

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