Study protocol for Vascular Access outcome measure for function: a vaLidation study In hemoDialysis (VALID)

BMC Nephrology

Table 1 Data collection schedule

Time point of data collection (months)	Assessor 1 (Index test)			Assessor 2 (Reference standard)
Time point of data collection (months)	0	3	6	0	3	6
Assessor characteristics	√			√
Patient consent (if required)				√
Patient characteristics				√
Number of vascular access intervention(s)		√	√		√	√
Type of vascular access intervention(s)		√	√		√	√
Date of vascular access intervention(s)		√	√		√	√
Extraction of procedure notes					√	√
Indication for vascular access intervention					√	√
Time required to collect/enter vascular access intervention data		√	√		√	√
Study end / Early exit		√^a	√		√^a	√
Feasibility questionnaire			√			√
Semi-structured interview			√			√

ISSN: 1471-2369