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Table 1 General characteristics of the participants with fibromyalgia and controls

From: Relations between serum magnesium and calcium levels and body composition and metabolic parameters in women with fibromyalgia

VariablesFibromyalgia n = 53Controls n = 50p-Value
Mean ± SDmedian (min-max)Mean ± SDmedian (min-max)
Age (years)48.1 ± 8.249 (26–60)47.1 ± 9.950 (23–60)0.8018
BMI (Kg/m2)26.6 ± 4.526.8 (15.2–38.6)25.5 ± 3.624.9 (19.2–32.9)0.2123
Lean mass (%)60.4 ± 7.559.8 (43.8–82.1)60.2 ± 6.958.9 (48.4–77.9)0.89
Fat mass (%)39.6 ± 7.540.1 (18–56.2)39.8 ± 6.941.1 (22.1–51.6)0.877
Laboratory tests
 Magnesium serum (mg/dL)2.2 ± 0.12.2 (1.8–2.6)2.2 ± 0.22.2 (1.8–2.6)0.577
 Calcium serum (mg/dL)9.7 ± 0.59.6 (8.8–11.2)9.6 ± 0.49.7 (8.8–10.3)0.3163
 US-CRP (mg/dL)0.3 ± 0.40.2 (< 0.09–1.9)0.3 ± 0.40.1 (< 0.09–2.6)0.454
 TC (mg/dL)210.4 ± 35.4207 (140–287)203.3 ± 30.4201.5 (133–266)0.279
 LDL (mg/dL)138.5 ± 30.8135 (81–209)130.9 ± 27.7129 (62–196)0.196
 HDL (mg/dL)47.1 ± 11.146 (30–84)50.3 ± 12.249 (28–78)0.133
 TG (mg/dL)123.6 ± 67.6100 (35–311)110.6 ± 67.696 (44–427)0.283
 Glycemia (mg/dL)82.9 ± 8.982 (59–101)83.9 ± 9.283 (60–103)0.593
  1. BMI body mass index, US-CRP C- ultra-sensitive C-reactive protein, TC total cholesterol, LDL low-density lipoproteins, HDL high-density lipoproteins, TG triglycerides. Student’s t test for the parametric data and the Wilcoxon Mann-Whitney test were used for the non-parametric. p < 0.05 is statistically significant