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Table 2 The mean and standard deviation of total and regional body composition data and BMI in total, normal QTc and prolonged QTc interval groups according to gender

From: Different body parts’ fat mass and corrected QT interval on the electrocardiogram: The Fasa PERSIAN Cohort Study

  Male Female
Total (n = 1415) QTc ≤ 450 ms (n = 1281) QTc > 450 ms (n = 134) P-value Total (n = 1802) QTc ≤ 470 ms (n = 1621) QTc > 470 ms (n = 181) P-value
Total         
Fat mass (%) 19.50 ± 7.10 19.35 ± 7.04 20.92 ± 7.50 0.015 34.11 ± 6.99 34.23 ± 6.89 33.07 ± 7.72 0.034
FMI (kg/m2) 4.97 ± 2.56 4.93 ± 2.53 5.43 ± 2.73 0.028 9.57 ± 3.46 9.61 ± 3.44 9.22 ± 3.59 0.153
FFMI (kg/m2) 19.17 ± 2.26 19.18 ± 2.25 19.15 ± 2.30 0.893 17.61 ± 1.80 17.61 ± 1.79 17.63 ± 1.82 0.883
FM:FFM ratio 0.25 ± 0.11 0.25 ± 0.11 0.28 ± 0.12 0.009 0.53 ± 0.16 0.54 ± 0.16 0.51 ± 0.17 0.056
Arms         
Fat mass (%) 35.63 ± 11.43 35.36 ± 11.33 38.25 ± 12.10 0.005 70.75 ± 18.18 71.00 ± 17.99 68.47 ± 19.66 0.075
FMI (kg/m2) 0.50 ± 0.27 0.50 ± 0.27 0.54 ± 0.28 0.056 1.07 ± 0.52 1.07 ± 0.52 1.03 ± 0.53 0.279
FFMI (kg/m2) 2.15 ± 0.35 2.15 ± 0.35 2.13 ± 0.36 0.490 1.78 ± 0.23 1.78 ± 0.23 1.78 ± 0.23 0.910
FM:FFM ratio 0.22 ± 0.09 0.22 ± 0.09 0.24 ± 0.10 0.005 0.58 ± 0.22 0.58 ± 0.22 0.55 ± 0.23 0.121
Legs         
Fat mass (%) 33.58 ± 11.50 33.42 ± 11.43 35.12 ± 12.08 0.102 80.65 ± 10.16 80.76 ± 10.08 79.63 ± 10.82 0.155
FMI (kg/m2) 1.40 ± 0.70 1.39 ± 0.70 1.49 ± 0.78 0.117 4.06 ± 1.19 4.07 ± 1.19 3.98 ± 1.22 0.340
FFMI (kg/m2) 6.53 ± 0.86 6.52 ± 0.86 6.56 ± 0.91 0.679 5.82 ± 0.67 5.82 ± 0.67 5.81 ± 0.69 0.745
FM:FFM ratio 0.21 ± 0.09 0.21 ± 0.09 0.22 ± 0.09 0.092 0.69 ± 0.14 0.69 ± 0.14 0.67 ± 0.15 0.183
Trunk         
Fat mass (%) 21.46 ± 8.33 21.27 ± 8.26 23.29 ± 8.75 0.007 29.59 ± 8.34 29.75 ± 8.24 28.20 ± 9.10 0.018
FMI (kg/m2) 3.09 ± 1.62 3.05 ± 1.60 3.41 ± 1.70 0.014 4.45 ± 1.82 4.47 ± 1.81 4.22 ± 1.90 0.076
FFMI (kg/m2) 10.49 ± 1.12 10.50 ± 1.12 10.46 ± 1.12 0.702 10.02 ± 0.96 10.02 ± 0.97 10.05 ± 0.95 0.659
FM:FFM ratio 0.29 ± 0.14 0.28 ± 0.13 0.32 ± 0.14 0.004 0.44 ± 0.17 0.44 ± 0.17 0.41 ± 0.17 0.029
BMI (kg/m2) 24.19 ± 4.41 23.91 ± 4.47 24.47 ± 4.80 0.170 26.86 ± 4.81 27.07 ± 4.96 26.6 ± 5.12 0.329
  1. QTc = corrected QT interval by Bazett formula. P-value reported as the result of independent-samples t-test between normal and prolonged QTc interval groups. Statistically significant P-values are bolded (P-value< 0.05)