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Table 2 Demographic/Clinical/Dialysis-Related Features of the Sample

From: Nocturnal sleep, daytime sleepiness, and quality of life in stable patients on hemodialysis

Demographic Variables Mean (SD*) or n** Median Range
Age 51.6 (10.8) 52.0 32.0 to 74.0
Gender (n)    
• Males 24   
• Females 22   
Race (n)    
• Black 36 -- --
• White 10   
Marital Status (n)    
• Married 27 -- --
• Divorced 4   
• Single 15   
Years of Education 12.3 (2.0) 12.0 7.0 to 18.0
Clinical Variables    
Etiology of Renal Failure (n)    
• Diabetes 15 -- --
• Hypertension 22   
• Glomerulonephritis 3   
• Other 6   
BUN (mg/dL) 65.0 (16.8) 63.0 39.3 to 105.0
Creatinine (mg/dL) 12.0 (2.8) 12.4 3.6 to 17.5
Sodium (meq/L) 139.9 (3.0) 139.5 132.3 to 147.3
Potassium (meq/L) 4.9 (0.7) 4.6 3.8 to 6.4
CO2 (meq/L) 20.6 (2.8) 20.7 13.8 to 27.7
Calcium (mg/dL) 9.5 (0.8) 9.6 7.5 to 11.4
Phosphorous (mg/dL) 5.4 (1.5) 5.3 2.8 to 10.5
Hematocrit (%) 35.8 (3.2) 36.2 28.9 to 43.2
Ferritin (μ/L) 549.1 (394.3) 515.0 13.4 to 1764.0
PTH (pg/ml) 222.9 (197.7) 184.5 13.0 to 1144.0
Body Mass Index (kg/m2) 26.8 (5.6) 26.8 17.0 to 40.1
• Black Males (n = 18) 25.8 (5.1)   18.8 to 36.8
• Black Females (n = 18) 28.0 (5.8)   17.0 to 40.1
• White Males (n = 6) 25.3 (6.1)   20.7 to 36.6
• White Females (n = 4) 27.3 (7.1)   18.3 to 35.5
Days hospitalized 2.2 (3.3) 0 0 to 12
Dialysis Variables    
Kt/V 1.5 (0.3) 1.5 1.1 to 2.6
Treatment time (minutes) 219.0 (24.1) 220.0 165.0 to 270.0
Shift    
• 1 18 -- --
• 2 13   
• 3 15   
Months on HD 37.5 (36.0) 28.5 5.0 to 184.0
  1. * SD = standard deviation, ** = number