Chart 1. Rules and exceptions.
| General rule | Exception | |
|---|---|---|
| Age | ||
| 1 | IF age is 40 to 59 years (27.0%) → Discharge (93.5%) | IF age is 40 to 59 years and ICD E115 (1.7%) → ¬ Death (66.7%) |
| 2 | IF age is 60 to 69 years (38.0%) → Discharge (87.9%) | IF age is 60 to 69 years and ICD I739 (1.7%) → ¬ Death (66.7%) |
| 3 | IF age is 70 years or more (35.0%) → Discharge (86.9%) | IF age is 70 years or more and ICD I743 (1.1%) → ¬ Death (100.0%) |
| Sex | ||
| 4 | IF sex is female (31.2%) → Discharge (85.2%) | IF sex is female and ICD E115 (1.1%) → ¬ Death (100.0%) IF sex is female and ICD I739 (1.7%) → ¬ Death (66.7%) |
| Marital status | ||
| 5 | IF widowed (19.0%) → Discharge (90.9%) | IF widowed and retired (1.7%) → ¬ Death (66.7%) |
| 6 | IF married (63.0%) → Discharge (86.2%) | IF married and ICD I743 (1.7%) → ¬ Death (66.7%) |
| Race | ||
| 7 | IF race is white (94.2%) → Discharge (88.3%) | IF race is white and ICD I743 (1.7%) → ¬ Death (66.7%) IF race is white and ICD I739 (1.7%) → ¬ Death (66.7%) |
| Educational level | ||
| 8 | IF literate (17.8%) → Discharge (93.5%) | --- |
| 9 | IF Primary Ed. completed (13.8%) → Discharge (87.5%) | --- |
| 10 | IF Primary Ed. not completed (32.2%) → Discharge (83.9%) | IF Primary Ed. not completed and ICD I743 (1.1%) → ¬ Death (100.0%) |
| Hypertension | ||
| 11 | IF no hypertension (26.0%) → Discharge (93.3%) | --- |
| 12 | IF death (9.8%) → Hypertension (88%) | --- |
| 13 | IF death and hypertension (8.7%) → Diabetes (86.7%) | --- |
| Diabetes | ||
| 14 | IF no diabetes (24.0%) → Discharge (87.8%) | --- |
| 15 | IF death (9.8%) → Diabetes (82.0%) | --- |
| 16 | IF diabetes (72.0%) → Discharge (88.1%) | IF diabetes and ICD I739 (1.1%) → Death (100.0%) |
| Smoking | ||
| 17 | IF ex-smoker (24.0%) → Discharge (95.2%) | --- |
| 18 | IF smoker (21.0%) → Discharge (83.8%) | --- |
| 19 | IF non-smoker (27.0%) → Discharge (95.7%) | --- |
| Alcoholism | ||
| 20 | IF no alcoholism (46.0%) → Discharge (92.4%) | IF no alcoholism and retired (1.7%) → Death (66.7%) IF no alcoholism and ICD E115 (1.1%) → Death (100.0%) IF no alcoholism and ICD I739 (1.1%) → Death (100.0%) |
| Rehospitalization | ||
| 21 | IF more than one amputation (33.9%) → Discharge (96.6%) | --- |
| 22 | IF death (9.8%) → one amputation (88.2%) | --- |
| 23 | IF death and one amputation (8.7%) → Spinal anesthesia (80.0%) | --- |
| 24 | IF death and one amputation (8.7%) → Diabetes (80.0%) | --- |
| 25 | IF one amputation (65.5%) → Discharge (85.1%) | IF one amputation and ICD E115 (2.9%) → Death (60.0%) |
| Type of surgery | ||
| 26 | IF amp./disart. leg and lower limbs (13.0%) → Discharge (90.9%) | --- |
| 27 | IF death (9.8%) → Amputation at thigh (64.0%) | IF death and duration 0 to 30 min (1.7%) → Amp./disart. of hallux (66.7%) |
| 28 | IF amputation at thigh (28.0%) → Discharge (72.9%) | IF amputation at thigh and ICD E115 (1.7%) → Death (100.0%) IF amputation at thigh and ICD I743 (1.1%) → Death (100.0%) |
| Type of Anesthesia | ||
| 29 | IF death (9.8%) → Spinal anesthesia (76.0%) | IF death and duration 0 to 30 min. (1.7%) → General anesthesia (inhaled and venous) (66.7%) IF death and duration 151 to 180 min. (1.1%) → General anesthesia (inhaled and venous) (100.0%) |
| 30 | IF general anesthesia (inhaled and venous) (13.0%) → Discharge (82.6%) | --- |
| Duration of surgery | ||
| 31 | IF duration = 0 to 30 min. (6.9%) → Discharge (75.0%) | IF duration = 0 to 30 min and general anesthesia (inhaled and venous) (1.7%) → Death (66.7%) |
| 32 | IF duration = 61 to 90 min. (24.7%) → Discharge (86.0%) | --- |
| 33 | IF duration 91 to 120 min. (23.6%) → Discharge (90.2%) | --- |
| 34 | IF duration = 121 to 151 min. (12.1%) → Discharge (85.7%) | IF duration = 121 to 151 min. and ICD E115 (1.1%) → Death (100.0%) |
ICD E115 is type 2 diabetes mellitus with circulatory complications. ICD I739 is peripheral vascular disease, unspecified. ICD I743 is embolism and thrombosis of arteries of the lower extremities.