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. 2017 Aug 22;4:2054358117725106. doi: 10.1177/2054358117725106

Table 3.

Schedule of Study Visits and Measures.

Baselinea Follow-upb
18-24 months
3 weeks 3 months 6 months 9 months 12 months
Survey
 Demographics +
 Diet (3-day diet record) + +
 Health history + + +
 Health-related quality of life + + +
 Water survey + + + +
Clinical
 Height (cm) +
 Weight (Kg) + +c +
 Waist circumference (cm) + +c +
 Blood pressure (mm Hg) + +c +
 Medications + +c +
Blood
 Blood sample + + + + + +
 Serum creatinine (μmol/L) + + + + + + +d
 Serum sodium (mmol/L) + + + + + +
 Urea (mmol/L) + + +
 Osmolality (mOsm/kg) + + +
 Copeptin (pmol/L) + +c
 Hematocrit (L/L) + + +
 Cystatin C (mg/L) + +c
 HbA1c (%) + + +
 Plasma samples for long-term storage +
Urine
 24-hour urine sample (L) + + + +d
  Urine creatinine (mmol/d) + + + +d
  Urine sodium (mmol/d) + + +
  Urine potassium (mmol/d) + + +
  Urea (mmol/d) + + +
  Osmolality (mOsm/kg) + + +
  Albumin (mg/d) + + +
  Measured Creatinine clearance (mL/min/1.73 m2) + + + +d
 Random spot urine sample +
  Specific gravity (g) +
  Osmolality (mOsm/kg) +
a

Prerandomization.

b

Time after randomization.

c

While local labs are able to measure and process blood and urine samples, they do not measure weight, blood pressure, cystatin C, or copeptin; these measures will be obtained at the participants’ follow-up kidney care clinic visit (approximately 9 months after randomization).

d

Posttrial data (18-24 months after randomization) will be obtained from participants’ medical charts where possible to reduce respondent burden.

The “+” symbol indicates that the measure was collected at this time point.