Table 2.
Baseline Characteristics of Patients Who Attended, Missed, or Rescheduled Treatment, After Matching
| Attended (N = 19,260) | Missed (N = 3,852) | Standardized Difference, %a | Pa | Attended (N = 10,640) | Rescheduled (N = 2,128) | Standardized Difference, %a | Pa | |
|---|---|---|---|---|---|---|---|---|
| Age, y | 61.4 ± 14.6 | 61.5 ± 13.8 | 0.6 | 0.73 | 61.4 ± 14.7 | 61.3 ± 14.8 | −0.8 | 0.73 |
| Female sex | 8,901 (46.2%) | 1,773 (46.0%) | −0.4 | 0.83 | 4,995 (46.9%) | 994 (46.7%) | −0.5 | 0.84 |
| Race | 0.87 | 0.83 | ||||||
| White | 7,544 (39.2%) | 1,515 (39.3%) | 0.3 | 4,616 (43.4%) | 911 (42.8%) | −1.2 | ||
| African American | 7,605 (39.5%) | 1,510 (39.2%) | −0.6 | 3,919 (36.8%) | 778 (36.6%) | −0.6 | ||
| Hispanic | 2,851 (14.8%) | 583 (15.1%) | 0.9 | 1,408 (13.2%) | 296 (13.9%) | 2.0 | ||
| Asian | 439 (2.3%) | 78 (2.0%) | −1.8 | 347 (3.3%) | 66 (3.1%) | −0.9 | ||
| Other/unknown | 821 (4.3%) | 166 (4.3%) | 0.2 | 350 (3.3%) | 77 (3.6%) | 1.8 | ||
| Vascular access | 0.97 | 0.83 | ||||||
| AVF | 12,945 (67.2%) | 2,595 (67.4%) | 0.3 | 7,111 (66.8%) | 1,414 (66.4%) | −0.8 | ||
| AVG | 4,073 (21.1%) | 808 (21.0%) | −0.4 | 2,398 (22.5%) | 492 (23.1%) | 1.4 | ||
| CVC | 2,242 (11.6%) | 449 (11.7%) | 0.0 | 1,131 (10.6%) | 222 (10.4%) | −0.6 | ||
| Dialysis vintage, mo | 46 [22-79] | 45.5 [22-78] | 0.0 | 0.50 | 46 [23-80] | 46 [22-80] | −0.3 | 0.30 |
| Body weight, kg | 81.8 ± 22.8 | 81.7 ± 22.2 | −0.3 | 0.85 | 83.0 ± 23.4 | 83.0 ± 23.3 | 0.2 | 0.92 |
| Cause of ESRD | 0.78 | 0.81 | ||||||
| Diabetes | 8,731 (45.3%) | 1,731 (44.9%) | −0.8 | 4,812 (45.2%) | 963 (45.3%) | 0.1 | ||
| Hypertension | 5,595 (29.0%) | 1,141 (29.6%) | 1.3 | 3,127 (29.4%) | 613 (28.8%) | −1.3 | ||
| Other | 4,934 (25.6%) | 980 (25.4%) | −0.4 | 2,701 (25.4%) | 552 (25.9%) | 1.3 | ||
| Diabetes | 13,146 (68.3%) | 2,627 (68.2%) | −0.1 | 0.94 | 7,507 (70.6%) | 1,490 (70.0%) | −1.2 | 0.62 |
| CHF | 3,575 (18.6%) | 722 (18.7%) | 0.5 | 0.79 | 2,079 (19.5%) | 416 (19.5%) | 0 | >0.99 |
| Anxiety/depression | 1,478 (7.7%) | 303 (7.9%) | 0.7 | 0.68 | 917 (8.6%) | 182 (8.6%) | −0.2 | 0.92 |
| Hepatitis C | 167 (0.9%) | 53 (1.4%) | 4.8 | 0.003 | 102 (1.0%) | 18 (0.8%) | −1.2 | 0.62 |
| PVD | 1,547 (8.0%) | 308 (8.0%) | −0.1 | 0.94 | 911 (8.6%) | 175 (8.2%) | −1.2 | 0.61 |
| Albumin, g/dL | 3.8 ± 0.4 | 3.8 ± 0.4 | −0.1 | 0.94 | 3.8 ± 0.4 | 3.8 ± 0.4 | 0.3 | 0.89 |
| Calcium, mg/dL | 9.0 ± 0.7 | 9.0 ± 0.7 | −0.2 | 0.92 | 8.9 ± 0.7 | 8.9 ± 0.7 | −0.4 | 0.86 |
| Phosphate, mg/dL | 5.2 ± 1.5 | 5.2 ± 1.5 | −1.1 | 0.53 | 5.2 ± 1.5 | 5.2 ± 1.5 | 0.6 | 0.81 |
| PTH, pg/mL | 349 [229-528] | 350 [228-517] | −0.1 | 0.90 | 356 [230-532] | 361 [236-546.5] | 0.9 | 0.13 |
| Ferritin, ng/mL | 722 ± 352 | 720 ± 361 | −0.7 | 0.67 | 726 ± 348 | 702 ± 348 | −6.9 | 0.004 |
| TSAT, %, | 29.9 ± 12.5 | 29.9 ± 12.8 | −0.4 | 0.84 | 30.1 ± 12.6 | 29.1 ± 12.0 | −7.8 | 0.001 |
| Hemoglobin, g/dL | 11.0 ± 1.1 | 11.0 ± 1.2 | −0.4 | 0.82 | 11.0 ± 1.1 | 11.0 ± 1.1 | −0.3 | 0.90 |
| Creatinine, mg/dL | 8.7 ± 3.0 | 8.6 ± 3.0 | −1.1 | 0.54 | 8.8 ± 3.1 | 8.8 ± 3.1 | 0.2 | 0.94 |
| Kt/V | 1.6 ± 0.3 | 1.6 ± 0.3 | 0 | 0.98 | 1.6 ± 0.3 | 1.6 ± 0.3 | −0.4 | 0.87 |
| nPCR, g/kg/d | 0.98 ± 0.27 | 0.98 ± 0.28 | 0.2 | 0.92 | 1.03 ± 0.28 | 1.03 ± 0.28 | −0.7 | 0.76 |
Note: Values for categorical variables are given as number (percent), and continuous variables are given as mean ± standard deviation or median [interquartile range]. Conversion factors for units: calcium in mg/dL to mmol/L, ×0.2495; creatinine in mg/dL to μmol/L, ×88.4.
Abbreviations: AVF, arteriovenous fistula; AVG, arteriovenous graft; CHF, congestive heart failure; CVC, central venous catheter; ESRD, end-stage renal disease; nPCR, normalized protein catabolic rate; PTH, parathyroid hormone; PVD, peripheral vascular disease; TSAT, transferrin saturation.
a
Versus attended.