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Table 2 Within group differences between baseline and 1, 3 and 6 months: Paired T-test

From: The effect of ultraviolet irradiation compared to oral vitamin D supplementation on blood pressure of nursing home residents with dementia

Group

Period

Outcome variable

Mean Change

95% CI of the difference

p-value

Lower

Upper

VD1

1–0 month, n = 11

Systolic BP

6,2

-10,1

22.7

,416

3–0 month, n = 30

Systolic BP

-3,8

−11.3

3,6

,300

6–0 month, n = 17

Systolic BP

− 4,9

−18,2

8.4

,444

1–0 month, n = 11

Diastolic BP

3,8

−7,1

14.7

,455

3–0 month, n = 30

Diastolic BP

−1,2

−7,5

5.1

,702

6–0 month, n = 17

Diastolic BP

−4,6

−13,4

4.1

,278

3–0 month, n = 24

25(OH)D3

−4,6

−11,4

2.2

,172

6–0 month, n = 21

25(OH)D3

4,9

−2,9

12,8

,208

UV(all)

1–0 month, n = 13

Systolic BP

−24,4

−41,9

−7,6

,008

3–0 month, n = 13

Systolic BP

−7,1

−22,9

8.6

,342

6–0 month, n = 8

Systolic BP

−7,7

−26,7

11,2

,366

1–0 month, n = 13

Diastolic BP

−7,1

−15,0

0.9

,076

3–0 month, n = 13

Diastolic BP

0,4

−6,0

6,8

,898

6–0 month, n = 8

Diastolic BP

2,7

−5.1

10.6

,437

3–0 month, n = 13

25(OH)D3

−6,3

−15,4

2.9

,163

6–0 month, n = 9

25(OH)D3

−11,5

−23.0

−0,02

,050

  1. 95% CI 95% Confidence interval, Systolic BP Systolic blood pressure, Diastolic BP Diastolic blood pressure, 25(OH)D3 serum 25-hydroxyvitamin D3
  2. UV (all): the group of the people, received any UVB radiation, VD1 group: people randomized in VD group plus the participants from the UV group who have refused irradiation