Reliability of the international spinal cord injury urodynamic basic data set version 1.0

Study design
A cross-sectional study.

Objective
To assess interrater and intrarater reliability of the International Spinal Cord Injury (SCI) Urodynamic Basic Data Set (UBS) version 1.0.

Setting
Urodynamic clinic at Maharaj Nakorn Chiang Mai Hospital.

Methods
Two raters independently analyzed urodynamic tracings from 50 patients and completed the UBS twice, each test 1 month apart. The interrater and intrarater reliability of this data set were analyzed using Kappa, Weighted Kappa, and the Intraclass correlation coefficient (ICC).

Results
Of the 50 patients, 72% were male. The mean (SD) age was 48.2 (16.6) years. The median time (IQR) since the injury was 27 months (0–101 months). The interrater reliability of the items of UBS were substantial to almost perfect (0.78–0.99). The intrarater reliability of the first rater was fair to almost perfect (0.37–1.00). The intrarater reliability of the second rater was moderate to almost perfect (0.51–1.00). Relatively low interrater and intrarater reliability were observed in bladder compliance and urethral function items.

Conclusion
The first version of UBS has acceptable interrater and intrarater reliability on most items. Although bladder compliance and urethral function have problematic interrater and intrarater reliability, they have been adjusted in the second version. Due to its simplicity and reliability, UBS is clinically useful for urodynamic assessment in people with SCI.