Table S1. Key characteristics of the 12 studies included in the meta-analysis.

Table S2. Standardized assessment of the overall quality of the 12 studies included in the meta-analysis, using the JADAD score [20] for randomized clinical trials and The Newcastle-Ottawa Scale (NOS) [21] for non-randomized cohort studies.

Table S3. Unadjusted and adjusted odds ratios of risk factors for CRT.

Table S4. Assessment of the heterogeneity of the associations between catheter-related thrombosis (CRT) and catheter tip location, past medical history of deep vein thrombosis, type of catheter (PICC vs. implanted ports) and insertion site (upper arm vein vs. subclavian vein).

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