Wang 2006.

Methods	Allocation: Randomized, drawing of lots. Blinding: No further details. Duration (mean (SD), d): Subclavian group 41.1 (19.8), Internal jugular 36.9 (17.8).
Participants	Diagnosis: Cancer patients who needed central venous catheterization. N=200. Age (mean (SD), y): Subclavian group 58.3 (17.6), Internal jugular 54.5 (19.0). Sex: F111, M89. Setting: The People's Hospital of Xingtai, Hebei, China.
Interventions	Subclavian site insertion (n=100). Internal jugular site insertion (n=100).
Outcomes	Catheter‐related infectious complications: Exit site infection. Mechanical complications.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Drawing of lots.
Allocation concealment (selection bias)	Unclear risk	No description.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No description.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No description.
Incomplete outcome data (attrition bias) All outcomes	High risk	Those leaving the study early were not included in analyses, only reported completed trial patients.
Selective reporting (reporting bias)	High risk	No results for haematoma, air embolism, and phlebitis, which were described in the method section.
Other bias	Unclear risk	No description.