Table 1.

Comparison of baseline characteristics between intervention arms

CharacteristicOverall Study Population (n=288)aFeedback Arm (n=120)Nurse Management Arm (n=100)P Valueb
Demographic variables
 Age (yr)63.2±13.563.9±12.062.6±14.30.44
 Sex (male)163 (56.6)65 (54.2)56 (56.0)0.79
 Race (African-American)115 (39.9)48 (40.0)38 (38.0)0.76
 Education0.75
  Less than high school41 (14.3)17 (14.2)14 (14.1)
  High school equivalent92 (32.1)38 (31.7)36 (36.4)
  More than high school154 (53.7)65 (54.2)49 (49.5)
 Adequate health literacyc218 (84.2)88 (85.4)79 (84.9)0.92
 Married127 (44.3)55 (45.8)37 (37.0)0.19
 Employed33 (11.5)12 (10.0)10 (10.0)0.99
Dialysis/clinical variables
 Dialysis vintage (yr)2.2 [3.4]2.1 [4.0]2.1 [3.2]0.45
 Dialysis adequacy (Kt/V)1.5±0.31.5±0.21.6±0.20.59
 Dialysis access0.62
  Catheter53 (18.9)21 (17.9)20 (20.6)
  AV fistula or graft228 (81.1)96 (82.1)77 (79.4)
 Monday/Wednesday/Fridayd185 (64.2)83 (69.2)58 (58.0)0.09
Comorbidity
 Charlson comorbidity index score0.54
  1–265 (22.9)25 (21.4)25 (25.0)
  3–4108 (38.0)45 (38.5)42 (42.0)
  >5111 (39.1)47 (40.2)33 (33.0)
 Diabetes147 (51.8)61 (52.1)51 (51.0)0.87
 Peripheral vascular disease35 (12.3)16 (13.7)11 (11.0)0.55
Laboratory values
 Hemoglobin (g/dl)11.6±1.111.8±1.011.4±1.10.01
 Albumin (g/dl)3.8±0.43.7±0.43.8±0.40.12
 Calcium (mg/dl)8.8±0.78.9±0.88.8±0.60.67
 Phosphorous (mg/dl)5.2±1.55.2±1.55.2±1.50.92
 Intact parathyroid hormone (pg/ml)263 [271]264 [274]250 [276]0.61
  • Data are presented as mean ± SD, median [interquartile range], or n (%). AV, arteriovenous.

  • a Includes all patients enrolled into the observational phase.

  • b Reflects statistical significance of comparisons of feedback arm with nurse management arm.

  • c Denotes patients with Rapid Estimates of Adult Literacy in Medicine instrument scores >60.

  • d Denotes dialysis treatment schedule.