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Table 1 Subject characteristics

From: Association of adolescent postural tachycardia syndrome classifications with anxiety: a cross sectional study

 

Su group (mean ± SE)

SI group (mean ± SE)

P

M/F

2/13

21/16

0.004*

Age (years)

13.2 ± 0.2 (11–15)

13.3 ± 0.3 (10–15)

0.840

ASD (AQ ≥ 25) (%)

14.3 (2/14)

30.6 (11/36)

0.303

Height (cm)

156.2 ± 1.3

160.4 ± 1.4

0.082

Body weight (kg)

43.6 ± 1.3

49.4 ± 1.7

0.051

BMI-SD

-0.8 ± 0.2

-0.3 ± 0.2

0.173

HR (beats/min)

Supine

91.7 ± 1.6

72.2 ± 1.5

 < 0.001*

Standing

119.9 ± 1.8

114.2 ± 1.4

0.164

ΔHR (beats/min)

28.1 ± 1.0

42.1 ± 0.9

 < 0.001*

SBP (mmHg)

Supine

114.5 ± 1.8

109.4 ± 1.6

0.073

Standing

114.1 ± 2.5

112.0 ± 1.8

0.500

DBP (mmHg)

Supine

67.7 ± 1.0

63.7 ± 1.0

0.023*

Standing

75.9 ± 1.7

76.2 ± 1.8

0.837

RR-HF (mSec2)

Supine

356.7 ± 84.9

669.6 ± 71.4

0.010*

Standing

96.5 ± 24.4

95.9 ± 13.0

0.785

RR-LF/HF

Supine

1.5 ± 0.2

1.3 ± 0.1

0.391

Standing

3.4 ± 0.5

4.6 ± 0.6

0.369

DBP-LF (mmHg2)

Supine

6.6 ± 1.1

6.8 ± 0.6

0.832

Standing

15.8 ± 2.2

11.9 ± 0.9

0.143

Pulse pressure (mmHg)

Supine

46.9 ± 1.5

45.7 ± 1.3

0.792

Standing

38.3 ± 2.1

35.8 ± 1.9

0.935

SV (ml)

supine

48.3 ± 4.8

59.9 ± 3.6

0.027*

  1. M Male, F Female, ASD Autism spectrum disorder, BMI Body mass index, HR Heart rate, ΔHR Change in HR from supine to standing, SBP Systolic blood pressure, DBP Diastolic blood pressure, RR-HF High-frequency component of RR interval variability, RR-LF/HF Ratio of the LF to HF components of RR interval variability, DBP-LF Low-frequency component of DBP variability, SV Stroke volume, Su Supine tachycardia, SI Standing-induced tachycardia
  2. Values are expressed as mean ± SE. *, p < 0.05 between Su and SI groups
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