Table 1. Patient characteristics according to the BMI level at start of dialysis.
| Body Mass Index (kg/m2) | |||||||
|---|---|---|---|---|---|---|---|
| Total (n = 19 524) |
<18.5 (n = 1 130) |
[18.5–23[ (n = 5 326) |
[23–25[ (n = 3 120) |
[25–30[ (n = 5 483) |
[30–39[ (n = 3 855) |
≥40 (n = 610) |
|
| Men | 63.3 | 46.4 | 62.8 | 71.5 | 69.3 | 57.9 | 35.9 |
| Age (year) | 54.9±11.9 | 49.7±14.5 | 51.6±13.5 | 55.2±11.5 | 56.9±10.5 | 57.9±9.6 | 57.0±9.8 |
| BMI (kg/m2) | 26.2±6.1 | 17.1 ± 1.2 | 21.1 ± 1.2 | 24.0 ± 0.6 | 27.3 ± 1.4 | 33.5 ± 2.6 | 44.6 ± 4.3 |
| Denormalized eGFR (ml/min) | 9.4±7.1 | 8.3±8.3 | 8.4±6.8 | 9.1±6.6 | 9.5±6.9 | 10.8±7.1 | 12.2±7.9 |
| eGFR (CKD EPI) (ml/min) | 8.0±6.0 | 9.2±7.2 | 8.1±6.4 | 8.0±6.1 | 7.8±5.6 | 8.1±5.5 | 8.2±5.4 |
| Primary renal disease | |||||||
| Polycystic kidneys | 10.2 | 5.5 | 11.7 | 13.1 | 11.4 | 6.8 | 2.5 |
| Glomerulonephritis | 17.1 | 18.3 | 20.2 | 18.0 | 17.2 | 12.8 | 9.2 |
| Vascular or hypertensive nephropathy | 15.5 | 14.6 | 13.2 | 16.2 | 17.3 | 16.3 | 12.1 |
| Diabetic nephropathy | 23.5 | 10.6 | 14.3 | 18.2 | 24.0 | 38.9 | 52.6 |
| Other or unknown | 33.7 | 51.0 | 40.6 | 34.6 | 30.1 | 25.2 | 23.6 |
| Comorbidities and disabilities | |||||||
| Diabetes | 35.6 | 16.7 | 21.2 | 27.5 | 38.0 | 58.0 | 73.9 |
| Type 2 diabetes | 30.3 | 10.6 | 14.2 | 22.2 | 33.7 | 53.9 | 71.0 |
| Congestive heart failure | 18.0 | 18.5 | 14.3 | 16.0 | 17.9 | 22.8 | 28.5 |
| Coronary heart disease | 17.9 | 10.8 | 13.0 | 16.6 | 20.2 | 24.0 | 21.0 |
| Dysrythmia | 10.1 | 7.1 | 7.0 | 8.8 | 11.4 | 13.7 | 13.9 |
| Stroke or transient ischemic attack | 7.9 | 7.4 | 7.0 | 7.9 | 8.0 | 9.3 | 7.4 |
| Peripheral vascular disease | 15.8 | 14.0 | 12.3 | 14.7 | 16.8 | 20.3 | 17.9 |
| Active malignancy | 7.8 | 11.8 | 9.0 | 8.4 | 7.2 | 5.7 | 4.8 |
| Chronic respiratory disease | 9.3 | 12.4 | 6.4 | 7.3 | 7.5 | 13.9 | 26.2 |
| Liver disease | 5.7 | 7.5 | 6.6 | 6.3 | 5.6 | 4.1 | 3.8 |
| Amputation | 2.2 | 2.2 | 1.5 | 1.8 | 2.2 | 3.3 | 4.6 |
| Hemiplegia or paraplegia | 1.9 | 2.4 | 2.0 | 1.8 | 1.8 | 1.6 | 1.7 |
| Severely impaired vision | 3.1 | 1.6 | 2.8 | 2.8 | 2.8 | 4.5 | 4.8 |
| Severe behavioral disorder | 3.3 | 6.6 | 3.5 | 3.0 | 2.5 | 3.3 | 2.7 |
| Mobility | |||||||
| Totally dependent for transfers | 3.1 | 4.7 | 2.7 | 2.5 | 2.7 | 3.5 | 6.6 |
| Need assistance mobility | 6.5 | 9.4 | 5.8 | 5.9 | 5.4 | 7.2 | 14.8 |
| Walk without help | 90.5 | 85.9 | 91.5 | 91.6 | 92.0 | 89.3 | 78.6 |
| Predialysis anemia care | |||||||
| Hemoglobin <11 g/dl | 35.0 | 30.7 | 33.6 | 36.3 | 37.4 | 34.7 | 28.8 |
| Predialysis ESA treatment | 49.5 | 47.2 | 47.5 | 48.5 | 50.8 | 51.4 | 52.2 |
| Nutritional status | |||||||
| Albuminemia (g/l) | 33.8±6.9 | 31.9±7.9 | 33.5±7.1 | 33.9±7.0 | 34.4±6.8 | 34.2±6.1 | 32.9±6.1 |
| Initial treatment condition | |||||||
| Planned HD | 59.1 | 51.7 | 56.0 | 58.8 | 60.2 | 63.5 | 64.0 |
| Unplanned HD | 28.4 | 36.5 | 30.5 | 27.7 | 26.1 | 26.5 | 32.1 |
| Peritoneal dialysis | 12.5 | 11.8 | 13.5 | 13.5 | 13.7 | 10.0 | 3.9 |
| Weekly number of HD sessions | |||||||
| 1–2 | 5.9 | 5.6 | 5.9 | 6.4 | 5.9 | 5.6 | 4.4 |
| 3 | 93.0 | 93.0 | 93.2 | 92.7 | 93.0 | 93.2 | 93.4 |
| >3 | 1.1 | 1.4 | 0.9 | 0.9 | 1.1 | 1.2 | 2.3 |
| Weekly HD session duration > 12 h | 7.5 | 2.9 | 4.3 | 6.0 | 8.1 | 11.6 | 17.8 |
Abbreviations: eGFR, estimated glomerular filtration rate; ESA, erythropoietin stimulating agent; HD, hemodialysis; CKD–EPI, Chronic Kidney Disease Epidemiology Collaboration.
Mean±s.d. or %.