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Table 4 Intraclass Correlations for covariate impacts (language, device size, and age)

From: Does scrolling affect measurement equivalence of electronic patient-reported outcome measures (ePROM)? Results of a quantitative equivalence study

Scale/Subscale

Spanish Speakers vs. English Speakers

Normal BYOD vs. Large BYOD

45–64 vs. 18–44 Years old

65+ vs. 18–44 years old

Estimated coefficient of reliability, ICC (95% CI)

p-value

Estimated coefficient of reliability, ICC (95% CI)

p-value

Estimated coefficient of reliability, ICC (95% CI)

p-value

Estimated coefficient of reliability, ICC (95% CI)

p-value

SF-12v2

 General Health

0.96 (0.94, 0.97)

0.934

0.96 (0.94, 0.97)

0.313

0.96 (0.94, 0.97)

0.413

0.96 (0.94, 0.97)

0.580

 Physical Functioning

0.92 (0.89, 0.94)

0.026

0.92 (0.89, 0.94)

0.368

0.91 (0.87, 0.93)

0.453

0.91 (0.88, 0.94)

0.085

 Role Physical

0.81 (0.76, 0.86)

0.517

0.81 (0.76, 0.85)

0.109

0.81 (0.74, 0.86)

0.615

0.82 (0.76, 0.87)

0.782

 Bodily Pain

0.71 (0.64, 0.78)

0.037

0.71 (0.64, 0.77)

0.029

0.72 (0.63, 0.79)

0.733

0.72 (0.63, 0.80)

0.651

 Vitality

0.82 (0.76, 0.86)

0.003

0.83 (0.78, 0.87)

0.309

0.81 (0.74, 0.87)

0.163

0.82 (0.75, 0.87)

0.376

 Social Functioning

0.84 (0.79, 0.88)

0.527

0.84 (0.79, 0.88)

0.992

0.82 (0.75, 0.87)

0.230

0.84 (0.78, 0.88)

0.162

 Mental Health

0.90 (0.86, 0.92)

0.153

0.90 (0.87, 0.92)

0.525

0.89 (0.84, 0.92)

0.055

0.88 (0.83, 0.91)

0.014

 Role Emotional

0.86 (0.81, 0.89)

0.622

0.86 (0.81, 0.89)

0.228

0.81 (0.74, 0.86)

0.028

0.84 (0.77, 0.88)

0.049

 Mental Component Summary

0.93 (0.90, 0.95)

0.356

0.93 (0.90, 0.95)

0.595

0.91 (0.87, 0.94)

0.015

0.92 (0.88, 0.94)

0.005

 Physical Component Summary

0.92 (0.89, 0.94)

0.147

0.92 (0.89, 0.94)

0.163

0.91 (0.87, 0.94)

0.372

0.91 (0.87, 0.93)

0.041

 SF-6D Health Utility Index

0.90 (0.87, 0.93)

0.114

0.90 (0.87, 0.93)

0.312

0.89 (0.84, 0.92)

0.160

0.91 (0.87, 0.93)

0.137

EQ-5D-5L

 Index Value

0.86 (0.82, 0.89)

0.131

0.86 (0.82, 0.90)

0.317

0.87 (0.81, 0.90)

0.460

0.87 (0.82, 0.91)

0.891

 EQ VAS

0.86 (0.81, 0.89)

0.553

0.85 (0.80, 0.89)

0.038

0.83 (0.77, 0.88)

0.587

0.88 (0.84, 0.92)

0.933

 Mobility

0.85 (0.81, 0.89)

0.210

0.85 (0.81, 0.89)

0.378

0.87 (0.81, 0.91)

0.276

0.82 (0.75, 0.87)

0.026

 Self-Care

0.77 (0.71, 0.82)

0.200

0.78 (0.72, 0.83)

0.712

0.78 (0.70, 0.84)

0.848

0.79 (0.72, 0.85)

0.617

 Usual Activities

0.74 (0.67, 0.80)

0.321

0.74 (0.68, 0.80)

0.514

0.78 (0.71, 0.85)

0.386

0.71 (0.62, 0.78)

0.677

 Pain / Discomfort

0.71 (0.64, 0.78)

0.254

0.72 (0.64, 0.78)

0.286

0.74 (0.65, 0.81)

0.341

0.71 (0.62, 0.79)

0.717

 Anxiety / Depression

0.90 (0.87, 0.92)

0.202

0.90 (0.87, 0.93)

0.323

0.89 (0.85, 0.92)

0.277

0.88 (0.84, 0.92)

0.067

0–100 VAS: Pain over the Past Week

0.86 (0.81, 0.89)

0.046

0.86 (0.81, 0.89)

0.040

0.88 (0.83, 0.91)

0.710

0.82 (0.76, 0.87)

0.239

11-Point NRS: Pain over the Past Week

0.94 (0.93, 0.96)

0.048

0.95 (0.93, 0.96)

0.096

0.95 (0.92, 0.96)

0.517

0.91 (0.87, 0.94)

0.086

7-Point Likert Scale: Pain over the Past Week

0.81 (0.75, 0.85)

0.222

0.81 (0.75, 0.85)

0.674

0.79 (0.72, 0.85)

0.667

0.84 (0.78, 0.89)

0.852