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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

20

25

30

35

erofpatients

Male

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0

5

10

15

20

25

30

35

40

45

Sufficient Insufficient Deficient

Numberofpatients

Negative

Positive