Table 53Hydrophilic coated vs. silicone catheters for long term indwelling catheterisation – Clinical study characteristics

OutcomeNumber of studiesDesignLimitationsInconsistencyIndirectnessImprecision
Mean catheter time in situ321RCTSerious limitations(a)No serious inconsistencyNo serious indirectnessNo serious imprecision
Encrustations leading to catheter change321RCTSerious limitations (a)No serious inconsistencyNo serious indirectnessSerious imprecision(b)
Catheter related adverse events321RCTSerious limitations (a)No serious inconsistencyNo serious indirectnessSerious imprecision(b)
Symptomatic UTI0RCT
Bacteraemia0RCT
Frequency of catheter change0RCT
Mortality0RCT
Patient preference and comfort0RCT
a

Unclear allocation concealment and selective outcome reporting where full data is not provided.

b

The relatively few events and few patients give wide confidence intervals around the estimate of effect. This makes it difficult to know the true effect size for this outcome.

From: 10, Long term urinary catheters

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Infection: Prevention and Control of Healthcare-Associated Infections in Primary and Community Care: Partial Update of NICE Clinical Guideline 2.
NICE Clinical Guidelines, No. 139.
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