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Table 2 Background characteristics

From: Effects of low-dose clonidine on cardiovascular and autonomic variables in adolescents with chronic fatigue: a randomized controlled trial

  Clonidine (n = 60) Placebo (n = 60)
Gender - no. (%)   
 Male 13 (22) 21 (35)
 Female 47 (78) 39 (65)
Age - years, mean ± SD 15.3 ± 1.5 15.5 ± 1.6
BMI - kg/m2, mean ± SD 21.6 ± 4.4 21.5 ± 4.0
Adheres to 1994 CFS case definition - no. (%)   
 No 14 (24) 15 (26)
 Yes 45 (76) 43 (74)
Genotype a – no. (%)   
 C/C 32 (53) 35 (58)
 C/G 25 (42) 19 (32)
 G/G 3 (5) 6 (10)
Disease duration - months, median (range) 18 (4 to 72) 18 (5 to 104)
Disease duration – months, mean ± SD 19.4 ± 13.0 23.5 ± 17.0
School absenteism - %, mean ± SD 66 ± 29 64 ± 31
Smokers – more than once a week – no. 1 0
  1. a The alpha2A receptor single nucleotide polymorphism (SNP) rs1800544. C = Cytosine, G = Guanine