Table 2.

Pre-hemodialysis Serum Concentration of Vancomycin in Relation to Demographic Characteristics

	Pre-hemodialysis Serum Concentration (mg/L)
Variable	Mean ± SD	Range	Test Statistic	p value*
Sex			t = 0.446	0.66
Male	21.80 ± 7.45	8.8–43.2
Female	22.64 ± 9.00	8.7–48.3
Racial background			t = 0.013	0.99
White	22.25 ± 8.83	15.1–44.0
African American	22.28 ± 8.27	8.7–48.3
Hypertension			t = 0.060	0.95
Yes	22.26 ± 8.28	8.7–48.3
No	22.46 ± 9.44	12.1–40.6
Diabetes mellitus			t = 0.491	0.62
Yes	21.92 ± 7.78	8.7–44.0
No	22.86 ± 9.26	10.3–48.3
Heart disease			t = 0.374	0.71
Yes	21.06 ± 8.63	8.7–48.3
No	22.85 ± 7.61	11.5–37.5
Cancer			t = 1.003	0.32
Yes	19.26 ± 6.61	10.3–30.5
No	22.56 ± 8.45	8.7–48.3
Type of infection			F = 0.846	0.47
Bacteremia	22.53 ± 8.96	8.7–48.3
Cellulitis	18.89 ± 5.44	8.8–24.6
Pneumonia	25.00 ± 8.11	13.9–40.6
Other	22.24 ± 24.00	12.1–36.2

F = F ratio for analysis of variance, SD = standard deviation, t = test result for Student t test..

^*Probability of statistical significance at α = 0.05.