Skip to main content

Table 4 Score Distribution and Internal Consistency Characteristics of TSS-IOP Scales (n = 250)

From: A new measure of patient satisfaction with ocular hypotensive medications: The Treatment Satisfaction Survey for Intraocular Pressure (TSS-IOP)

TSS-IOP Scales Mean (SD) Statistic Number of Items Chronbach's Alpha Skewness Statistic % Ceiling Test-Retest Reliability (ICC's)
Hyperemia 91.3 (17.7) 3 .84 -2.89 65.3% .86
Eye Irritation 91.2 (14.3) 4 .80 -2.71 48.4% .71
Convenience of Use 80.2 (15.4) 3 .86 -.53 20.8% .78
Ease of Use 68.9 (21.0) 3 .86 -.58 10.8% .86
Effectiveness 77.0 (16.7) 2 .83 -.95 14.9% .41