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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