Table 2 Agreement of Repeated Measurements, Test Retest Reliability, Internal Consistency and Item Total Correlation Values for ODI-U (n = 54 Patients)
From: Urdu version of Oswestry disability index; a reliability and validity study
ODI | First Measurement | Second Measurement | SEM | SDC | ICC (95% CI) | Cronbach’s Alpha | Item Total correlation |
|---|---|---|---|---|---|---|---|
Mean ± SD (n = 54) | Mean ± SD (n = 54) | ||||||
Question-1 | 2.09 ± 1.08 | 2.04 ± 1.06 | 0.28 | 0.77 | 0.93 (0.88–0.96) | NA | 0.68 |
Question-2 | 1.76 ± 1.50 | 1.78 ± 1.55 | 0.26 | 0.73 | 0.97 (0.95–0.98) | NA | 0.75 |
Question-3 | 1.89 ± 1.49 | 1.91 ± 1.26 | 0.73 | 2.02 | 0.72 (0.56–0.83) | NA | 0.74 |
Question-4 | 1.70 ± 1.57 | 1.70 ± 1.54 | 0.34 | 0.96 | 0.95 (0.92–0.97) | NA | 0.76 |
Question-5 | 2.02 ± 1.73 | 1.76 ± 1.54 | 0.76 | 2.10 | 0.79 (0.67–0.87) | NA | 0.58 |
Question-6 | 2.16 ± 1.68 | 2.02 ± 1.62 | 0.66 | 1.83 | 0.84 (0.75–0.91) | NA | 0.65 |
Question-7 | 1.29 ± 1.17 | 1.24 ± 1.26 | 0.32 | 0.88 | 0.93 (0.88–0.96) | NA | 0.52 |
Question-8 | 1.51 ± 1.55 | 1.37 ± 1.36 | 0.48 | 1.34 | 0.89 (0.81–0.93) | NA | 0.51 |
Question-9 | 1.81 ± 1.44 | 1.72 ± 1.34 | 0.66 | 1.84 | 0.77 (0.64–0.86) | NA | 0.62 |
Question-10 | 2.11 ± 1.69 | 2.05 ± 1.68 | 0.24 | 0.65 | 0.98 (0.96–0.99) | NA | 0.62 |
Total Score | 18.37 ± 10.18 | 17.59 ± 8.93 | 2.14 | 5.93 | 0.95 (0.92–0.97) | 0.89 | NA |