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Statistical analysis:
Data of the 84 ESRD patients were transferred into computerized
database form and checked for errors or inconsistency with the aid of
Microsoft excel 2007, program for windows.
Data management and statistical analysis were performed by SPSS
(statistical package for social sciences) version 20, for windows software.
Descriptive statistics for continuous variables; age, weight, Calcium
level, PO4, uric acid, cholesterol, Albumin, Ca dose, 1 alpha and vitD3
level, were presented as mean and standard deviation (SD), while for
categorical variables; sex, virology, exercise, and vitD3 categories
(sufficient, insufficient and deficient), were presented as frequencies andpercentages (%).
ANOVA test (F) test was used to assess the significance of association
between vitD3 and the continuous variables, distributed by three
categories of vit. D3 level. Students t test was used to compare sufficient
and insufficient groups.
Chi square test was used to assess the significance of association of
VitD3 categories with other categorical variables, Fisher exact test wasused alternatively when chi square couldnt be applied.
Level of significance was two tailed and set at P0.05 to be considered as
significant.
Results were presented in tables and figures with an explanatory
paragraph for each table and figure.
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Results
Table 1. Characteristics of patients (N=84)
Variable mean SD n (%)
SexMale 44 (52.4)
Female 40 (47.6)
Age 49.82 12.94
Weight 68.8 17.5
Duration 24.8 20.8
VitD3 level 33.02 7.2
Corrected Ca 8.6 1.4
PO4 3.9 1.4
Uric acid 6.1 2.4
Cholesterol 149.9 39.2
Albumin 3.0 0.8
Ca Dose 1082.1 389
1 alpha 1.97 1.01
VirologyNegative 29 (34.5)
Positive 55 (65.5)
Exercise
0 4 (4.8)
1 18 (21.4)
2 22 (26.2)
3 40 (47.6)
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Figure 1. Frequency distribution of Vit.D3 level of patients by categories.
Table 2. Correlation between patients parameters and Vit.D3 level
distributed by categories. (N=84)
Parameter
(mean)
Vit. D3 categories P value
sufficient vs.
insufficient
P.value
comparison
of 3 groupsSufficient Insufficient Deficient
Age (years) 49.92 50.95 18.3 0.74 0.045 [sig]
Weight (kg) 69.9 66.7 56.1 0.43 0.54
Corrected Ca 8.55 8.66 9.30 0.75 0.83
PO4 3.74 4.09 5.70 0.31 0.25
Uric acid 6.00 6.19 7.30 0.76 0.83
Cholesterol 148.5 153.3 151 0.62 0.88
Albumin 3.12 2.80 3.0 0.034 [sig] 0.18
Duration 28.0 16.3 24 0.022 [sig] 0.07
Ca Dose 1120 978 1200 0.14 0.26
1 alpha 1.93 1.96 3.00 0.91 0.59
71.4%
27.4%
1.2%0
10
20
30
40
50
60
70
Sufficient Insufficient Deficient
Numberofpatients
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Table 3. Correlation of vitamin D3 level with gender , virology, and
exercise among study group (N=84).
Variables
Vit D3 categoriesP
sufficient
vs.
insufficient
P
all groupsSufficient Insufficient Deficient
N % N % N %
Sex Male 32 72.7 11 25.0 1 2.30.81 0.57
Female 28 70.0 12 30.0 0 0.0
Virology Positive 17 58.6 12 41.4 0 0.00.041
0.043
[sig]Negative 43 78.2 11 20.0 1 1.8
Exercise 0 3 75.0 1 25.0 0 0.0
0.94 0.961 12 66.7 6 33.3 0 0.0
2 16 72.7 6 27.3 0 0.0
3 29 72.5 10 25.0 1 2.5
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15
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25
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35
erofpatients
Male
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0
5
10
15
20
25
30
35
40
45
Sufficient Insufficient Deficient
Numberofpatients
Negative
Positive