NCT01100580.

Trial name or title	The links between water and salt intake, body weight, hypertension and kidney stones: a difficult puzzle
Methods	Prospective, randomised, open‐label, interventional study
Participants	For stone formers main inclusion criteria age between 20 and 70 years Caucasian race idiopathic calcium stone disease normal renal function (creatininemia < 1.2 mg/dL)
Interventions	Dietary supplement: low salt diet + water therapy
Outcomes	Primary outcome Normalisation of urinary stone risk factors Secondary outcomes Urinary sodium/calcium relationship Blood pressure reduction Relationship between 24‐h calciuria and blood pressure Stone rate reduction Correlation BMI‐urinary stone risk factors Compliance
Starting date	May 2010
Contact information	Prof Loris Borghi +390521703375 loris.borghi@unipr.it
Notes	Latest information: Study not yet recruiting (1 December 2018)

BMI: body mass index