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Table 2 Characteristics of patients

From: CMR validation of left ventricular volumes and ejection fraction measured by the IQ-SPECT system in patients with small heart size

Characteristic

Total

Small-heart group

Normal-heart group

P

Male

Female

Total

Male

Female

Total

Overall small vs. overall normal

Sex (M/F, n)

49 (26/23)

12

17

29

14

6

20

0.048*

Age (years)

53.7 ± 15.0

59.3 ± 9.1

61.0 ± 10.1

60.3 ± 9.6

46.1 ± 15.3

39.7 ± 19.4

44.2 ± 16.4

 < 0.001*

Height (m)

1.63 ± 0.08

1.65 ± 0.05

1.56 ± 0.05

1.60 ± 0.07

1.71 ± 0.06

1.62 ± 0.04

1.69. ± 0.07

 < 0.001*

Mass (kg)

65.9 ± 10.3

67.6 ± 9.5

61.8 ± 8.5

64.2 ± 9.2

72.6 ± 11.2

58.8 ± 4.7

71.3 ± 13.9

0.162#

BMI (kg/m2)

24.8 ± 4.0

24.9 ± 3.4

25.4 ± 4.4

25.2 ± 3.9

24.9 ± 4.4

22.4 ± 2.2

24.9 ± 4.5

0.355#

Main risk factors (n)

        

Obesity (BMI > 25 kg/m2)

21 (42.9%)

7 (58.3%)

7 (41.2%)

14 (48.3%)

6 (42.9)%

1 (16.7%)

7 (35.0%)

0.356#

Diabetes mellitus Angina pectoris

11 (22.5%)

3 (25.0%)

6 (35.3%)

9 (31.0%)

1 (7.1%)

1 (16.7%)

2 (10.0%)

0.166#

Angina pectoris

19 (38.8%)

5 (41.7%)

6 (35.3%)

11 (37.9%)

5 (35.7%)

3 (50.0%)

8 (40.0%)

0.884#

Electrocardiographic abnormalities pattern

34

6 (50.0%)

13 (76.5%)

19 (65.5%)

10 (71.4%)

5 (83.3%)

15 (75.0%)

0.479#

Coronary artery stenosis

12 (24.5%)

1 (8.3%)

3 (17.7%)

4 (13.8%)

7 (50.0%)

1 (16.7%)

8 (40.0%)

0.079#

Hypertension

18 (36.7%)

5 (41.7%)

10 (58.8%)

15 (51.7%)

3 (21.4%)

0

3 (15.0%)

0.020*

  1. Abnormal ECG features included supraventricular or ventricular arrhythmias, ST-segment elevation or depression, T-wave elevation or inversion, right axis deviation, etc.
  2. Data are shown as the means ± standard deviations or n (%)
  3. The P values refer to differences between the overall small-heart group and the overall normal group. *Represents P < 0.05, and # represents P > 0.05
  4. BMI: body mass index; ECG: electrocardiogram