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Table 1 Main characteristics of SLE patients versus matched-healthy controls

From: Low dynamic muscle strength and its associations with fatigue, functional performance, and quality of life in premenopausal patients with systemic lupus erythematosus and low disease activity: a case–control study

Variable SLE CONTROLS Difference between means P-value
(n = 25) (n = 25) (95% CI)#
Age, years, median (IQR)† 29.9 (6.8) 29.2 (8.1)   0.7671
Body mass, kg 57.7 ± 6.7 58.3 ± 8.2 0.69 (-3.6, 4.9) 0.7462
Height, cm 158.1 ± 0.1 158.3 ± 0.9 -0.01 (-0.1, 0.1) 0.6573
Lean body mass, kg 38.1 ± 4.8 38.5 ± 3.8 0.5 (-2.1, 2.9) 0.6966
BMI, kg/height2 23.1 ± 2.9 23.5 ± 3.3 0.5 (-13, 2.2) 0.5998
Body fat, % 33.5 ± 9.2 33.2 ± 8.6 -0.3 (-5.4, 4.7) 0.8997
Sum of skinfolds, mm 79.8 ± 19.4 79.6 ± 18.4 -0.1 (-10.9, 10.6) 0.9769
Thigh skinfold, mm 23.1 ± 5.6 22.3 ± 6.4 -0.8 (-4.2, 2.6) 0.6351
Right thigh circumference, cm 55.2 ± 4.2 56.2 ± 3.6 1.1 (-1.2, 3.3) 0.3404
Systolic blood pressure, mmHg 108.0 ± 10.2 106 ± 8.6 -2.3 (-7.7, 3.1) 0.3818
Diastolic blood pressure, mmHg, median (IQR)† 68.0 (11.4) 69.0 (9.8)   0.7410
Heart rate, bpm 80.0 ± 10.3 81.0 ± 14.9 1.2 (-6.1, 8.5) 0.7432
  1. * Values are expressed as the mean ± SD unless otherwise stated. † These variables are not normally distributed and therefore, are expressed as median. # Calculated only when Student’s t-test was used. SLE systemic lupus erythematosus, CI confidence interval, IQR interquartile range, BMI body mass index, mmHg millimetres of Mercury, BPM beats per minute.