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Table 1 Key practical aspects of the study with all the clinical visits and the requested exams

From: Effects of transcutaneous electrical nerve stimulation (TENS) on arterial stiffness and blood pressure in resistant hypertensive individuals: study protocol for a randomized controlled trial

Visits Screening 1st week 2nd week 3rd week 4th week
Weeks −1 1 2 3 4
Informed consent X     
Inclusion and exclusion criteria X X    
Medical history X     
Medical evaluation/physical examination (BP measure) X X X X X
Randomization   X    
Application of TENS (3x/week)   X X X X
Creatinine X     X
Fasting glucose X     X
Glycated hemoglobin X     X
Potassium X     X
Uric acid X     X
Insulin X     X
Total cholesterol X     X
HDL-c X     X
Triglycerides X     X
Urinary sodium X     X
Urinary potassium X     X
Microalbuminuria X     X
GFR estimation X     X
Specific biochemistry tests   X    X
Ambulatory blood pressure monitoring   X    X
24-h electrocardiographic monitoring   X    X
Evaluation of sympathetic activity   X    X
Evaluation of endothelial function   X    X
Evaluation of arterial stiffness   X    X
  1. BP Blood pressure, TENS transcutaneous electrical nerve stimulation, HDL-c high-density lipoprotein cholesterol, GFR glomerular filtration rate