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Table 4 Mean score of the OIQ items in each subgroup

From: Orthostatic intolerance symptoms are associated with depression and diminished quality of life in patients with postural tachycardia syndrome

(n = 107)

OIQ score

0–4

(n = 16)

5–9

(n = 15)

10–14

(n = 21)

15–19

(n = 25)

20–24

(n = 17)

25–29

(n = 4)

30–34

(n = 6)

35–39

(n- = 3)

Total

1. Nausea

0.1 ± 0.1

0.3 ± 0.2

0.5 ± 0.2

1.3 ± 0.3

1.5 ± 0.3

3.0 ± 0.7

3.0 ± 0.5

3.0 ± 0.6

1.1 ± 0.1

2. Tremor in hands

0.1 ± 0.1

0.5 ± 0.3

0.4 ± 0.2

0.7 ± 0.2

1.2 ± 0.2

3.3 ± 0.3

2.7 ± 0.3

3.7 ± 0.3

0.9 ± 0.1

3. Dizziness

1.1 ± 0.3

1.4 ± 0.2

2.5 ± 0.3

2.8 ± 0.2

3.4 ± 0.2

3.3 ± 0.5

3.8 ± 0.2

4.0 ± 0.0

2.5 ± 0.1

4. Palpitation

0.3 ± 0.1

0.5 ± 0.2

0.9 ± 0.2

1.8 ± 0.2

2.8 ± 0.3

2.5 ± 0.7

3.5 ± 0.2

4.0 ± 0.0

1.5 ± 0.1

5. Headache

0.5 ± 0.2

1.2 ± 0.3

2.3 ± 0.3

2.4 ± 0.2

2.8 ± 0.2

3.3 ± 0.5

4.0 ± 0.0

3.7 ± 0.3

2.2 ± 0.1

6. Profuse perspiration

0.1 ± 0.1

0.1 ± 0.1

0.4 ± 0.2

1.2 ± 0.2

0.6 ± 0.2

0.3 ± 0.3

1.3 ± 0.5

3.0 ± 0.6

0.7 ± 0.1

7. Blurred vision

0.4 ± 0.2

0.6 ± 0.2

0.8 ± 0.2

1.2 ± 0.2

1.9 ± 0.3

1.3 ± 0.8

2.5 ± 0.6

4.0 ± 0.0

1.2 ± 0.1

8. Chest discomfort

0.0 ± 0.0

0.7 ± 0.2

0.6 ± 0.2

1.5 ± 0.2

1.8 ± 0.3

3.0 ± 0.4

3.7 ± 0.2

4.0 ± 0.0

1.3 ± 0.1

9. Lightheadedness

0.2 ± 0.1

0.8 ± 0.2

1.5 ± 0.3

2.3 ± 0.2

2.9 ± 0.2

3.5 ± 0.3

3.8 ± 0.2

4.0 ± 0.0

1.9 ± 0.1

10. Concentration difficulties

0.3 ± 0.1

0.7 ± 0.2

1.4 ± 0.3

2.1 ± 0.2

2.4 ± 0.2

3.5 ± 0.3

4.0 ± 0.0

3.7 ± 0.3

1.7 ± 0.1

OIQ total

3.0 ± 0.3

6.7 ± 0.4

11.3 ± 0.3

17.3 ± 0.3

21.2 ± 0.3

26.8 ± 1.0

32.3 ± 0.8

37.0 ± 1.0

14.9 ± 0.9

  1. The values are demonstrated as the mean ± SEM
  2. The two most common symptoms in each group are displayed in bold characters