Table 1.
Characteristics of the Cohorts and Comparison Group
| PD Cohort | Control Group |
Primary HD Cohort |
P | |
|---|---|---|---|---|
| No. | 51 | 101 | 338 | |
| Age category | < 0.001 a | |||
| < 55 y | 37.3 | 0.0 | 0.0 | |
| 55-64 y | 33.3 | 40.6 | 29.6 | |
| ≥ 65 y | 29.4 | 59.4 | 70.4 | |
| age, yr | 57.5 +/−14.8 | 68.5 +/−9.6 | 71.2 +/−9.5 | < 0.001 a |
| Women | 33.3 | 56.4 | 45.9 | 0.007 a |
| Education category | 0.3 a | |||
| 0-8 y | 4.0 | 4.0 | 11.2 | |
| 9-12 y | 42.0 | 28.7 | 43.5 | |
| > 12 y | 54.0 | 67.3 | 45.3 | |
| Education duration, yr | 13.2 +/−2.4 | 14.3 +/−3.0 | 12.8 +/−3.0 | 0.03 a |
| Race | < 0.001 a | |||
| African American | 27.5 | 7.9 | 11.2 | |
| White | 54.9 | 89.1 | 82.5 | |
| Other | 17.7 | 3.0 | 6.2 | |
| Dialysis duration category | 0.7 b | |||
| 0-12 mo | 27.6 | - | 28.5 | |
| 13-24 mo | 31.0 | - | 24.3 | |
| > 24 mo | 41.4 | - | 47.2 | |
| dialysis duration, mo | 23.0 +/−15.6 | - | 32.8 +/−32.8 | 0.005 b |
| Diabetes | 41.2 | 22.8 | 46.8 | 0.01 a |
| Stroke | 11.8 | 7.9 | 23.4 | 0.4 a |
Note: Categorical variables are presented as column percentages; continuous variables are presented as mean +/− standard deviation. Control group consisted of individuals without CKD.
a
The chi-square test for categorical variables was used to compare the PD cohort and the comparison group.
b
The chi-square test for categorical variables was used to compare the PD cohort and HD cohorts. Abbreviations: CKD, chronic kidney disease; HD, hemodialysis; PD, peritoneal dialysis.