Table 1 Baseline characteristics to predict ESRD (RRT) and how they were measured using Kaiser Permanente Northwest data during the baseline period (1997-1999)
Characteristic | Data source |
|---|---|
Demographic characteristics for matching | |
Age | Membership file |
Sex | Membership file |
CLINICAL CHARACTERISTICS | |
Height and weight (body mass index) | Height and weight recorded as separate fields in the medical record. |
Current smoking | Visit with ICD-9 code 305.1, or recorded as separate field in electronic medical record |
Hypertension | Visit with ICD-9 codes: 401.xx - 405.xx, or blood pressure values recorded as separate fields in the electronic medical record (systolic ≥140 or diastolic ≥90) |
Hyperlipidemia | Visit with ICD-9 code 272.x, or laboratory values for total cholesterol (>199 mg/dL), low density lipoprotein (>129 mg/dL) or prescription for any statin |
Diabetes Mellitus | Diabetes Registry |
Coronary artery disease | Visit with ICD-9 codes: 410.xx - 414.xx (excluding 414.10, 414.11, 414.19), 402.01, 402.11, 402.91, 404.01, 404.03, 404.11, 404.13, 404.91, 404.93, 429.4A, 429.9B, 429.9A |
Congestive heart failure | Visit with ICD-9 codes: 428.0, 428.9, 402.01, 402.11,402.91, 404.01, 404.03, 404.11, 404.13, 404.91, 404.93, 429.4A, 429.9B, 429.9A, 428.1 |
Peripheral vascular disease | Visit with ICD-9 codes: 250.7x, 440.xx, 443.81, 443.9 |
Retinopathy | Visit with ICD-9 codes: 250.5, 362.1, 362.10, 362.02A, 362.02, 362.29 |
CKD | Visit with ICD-9 codes (referenced in the US Renal Data Systems Annual report in 2004): 016.0, 095.4, 189.0, 189.9, 223.0, 236.91, 250.4, 271.4, 274.1, 283.11, 403.x1, 404.x2, 404.x3, 440.1, 442.1, 447.3, 572.4, 580-588, 591, 642.1, 646.2, 753.12-753.17, 753.19, 753.2, 794.4 |
Kidney stones | Visit with ICD-9 codes: 592.xx, 274.11 |
Uric acid/Gout | Visit with ICD-9 code 274.0, or laboratory value for uric acid (>7.0 mg/dL) |
Laboratory characteristics | |
Renal function | Laboratory values for serum creatinine (glomerular filtration rate estimated from the four-variable MDRD Study equation, but omitting race and assuming everyone was white) |
Inflammation | Laboratory values for sedimentation rate(> 20 mm/hr), C-reactive protein (> 0.9 mg/dL) (low serum albumin, wbc count × 2 measures, wbc without bandemia or no eosinophilia, d-dimer, inflammation codes) |
Urine Protein | Laboratory values for proteinuria (1+ or greater, with negative leucocyte esterase) |
Fasting plasma glucose | Laboratory values for fasting glucose (>125 mg/dL) |