Biering‐Sorensen 2007

Methods	DESIGN: Randomised controlled cross‐over trial BLINDING PROCEDURES: Single blind (to investigator) SAMPLE CALCULATION: Yes DURATION: 2 days WITHDRAWALS/DROPOUTS: Not stated ITT: Not applicable GEOGRAPHICAL LOCATION: Denmark SETTING: Outpatient clinic
Participants	N = 24 DIAGNOSIS: Spinal cord lesion ELIGIBLE: Not stated ENROLLED: 24 COMPLETED: 24 AGE: Adults GENDER: Female
Interventions	Short length female catheter (hydrophilic coated) versus standard length (various designs) female catheter
Outcomes	Residual urine measured by ultrasound, satisfaction, handling, suitability of length
Notes	No difference in residual urine outcomes, satisfaction or ease of handling
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	"Participants were randomised in blocks of four"
Allocation concealment (selection bias)	Unclear risk	Not stated
Blinding of participants and personnel (performance bias) All outcomes	Low risk	"Single‐blind". Not possible to blind participants, but outcome assessment was blinded and the non‐blinding of participants was considered unlikely to introduce bias.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	"Study nurse (who carried out the ultrasound) was not present during the catheterization in order to remain blinded regarding the type of catheter used". participant‐reported handling and satisfaction of catheter and was unblinded.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No missing outcome data.
Source of Funding	Unclear risk	Coloplast A/S