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Table 1 Patient characteristics

From: Effect of tadalafil on blood flow, pain, and function in chronic cold Complex Regional Pain Syndrome: a randomized controlled trial

  tadalafil placebo P-value
n 12 12  
Age, years 39.8 ± 13.1 36.5 ± 10.6 0.56 1
Gender (female/male) 9/3 11/1 0.29 2
Duration of CRPS, months 37.1 ± 24.5 55.7 ± 52.3 0.60 1
Smoking (yes/ex-smoker/no) 6/1/5 4/2/6 0.66 3
Temperature of CRPS foot, °C 26.8 ± 2.8 28.3 ± 4.7 0.60 1
Temperature of contra lateral foot, °C 28.5 ± 2.8 29.9 ± 3.3 0.27 1
Difference in temperature, °C 1.7 ± 0.77 1.7 ± 2.6 0.411
  1. 1 Mann Whitney U test; 2 Fisher's Exact test; 3 χ2
  2. test Values are the mean ± SD unless otherwise indicated