High Serum Alkaline Phosphatase, Hypercalcaemia, Race, and Mortality in South African Maintenance Haemodialysis Patients

Table 3

Patient characteristics by serum calcium categories.

Parameters	<2.10 mmol/L ()	2.10–2.37 mmol/L ()	2.38–2.75 mmol/L ()	>2.75 mmol/L ()	-value
Age (years)					0.09
Systolic Bp (mmHg)					0.18
Diastolic Bp (mmHg)					0.38
Haemoglobin (g/dL)					0.20
Albumin g/L					0.26
T.chol (mmol/L)					0.97
25-OH vitamin D (ng/mL)					0.11
PTH (pg/mL)					0.01
Phosphate (mmol/L)					0.66
Creatinine(μmol/L)					0.002
Kt/V					0.33
Dialysis vintage (months)					0.80
Dialysate calcium (mmol/L)					0.50
DM,	13	15	17	11	0.40
Medications
Calcium carbonate (%)	30 (96.8%)	79 (85.7%)	41 (71.9%)	13 (39.4%)	<0.001
Alfacalcidol (%)	28 (90.3%)	63 (68.4%)	35 (61.4%)	11 (33.3%)	<0.001

Continuous variables are presented as means ± standard deviations or median (interquartile range) and categorical data as frequencies (percentages). BP = blood pressure, PTH = parathyroid hormone, values derived by one-way ANOVA, and Kruskal-Wallis tests for continuous variables and Chi-squared for categorical variables. Serum categories based on KDOQI reference range.