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Table 5 The psychometric properties of the Evidence-Based Medicine Questionnaire

From: Development and validation of the Evidence Based Medicine Questionnaire (EBMQ) to assess doctors’ knowledge, practice and barriers regarding the implementation of evidence-based medicine in primary care

No. Items Test-Retest Reliability
Corrected Item-total Correlation Cronbach’s alpha if items is deleted Test (n = 320) Retest (n = 184) ICC
Mean (SD) Median Mean (SD) Median  
Knowledge Domain
 C2 Bandolier (Published in Oxford) 0.487 0.811 1.31 (0.650) 1.00 1.68 (1.003) 1.00 0.567
 C5 Database of abstracts of reviews of effectiveness(DARE) 0.630 0.778 1.54 (0.916) 1.00 1.67 (0.922) 1.00 0.485
 C6 Centre of Evidence-Based Medicine (CEBM) 0.630 0.777 1.44 (0.769) 1.00 1.76 (0.937) 1.00 0.453
 C10 ACP Journal Club 0.570 0.791 1.62 (0.844) 1.00 1.55 (0.886) 1.00 0.333
 C13 InfoClinics 0.566 0.791 1.58 (0.907) 1.00 1.63 (0.913) 1.00 0.418
 C14 Centre of Reviews & Dissertation (CRD) 0.650 0.780 1.52 (0.863) 1.00 1.48 (0.815) 1.00 0.396
 C3 Evidence-based medicine (EBM) 0.492 1.52 (0.863) 3.00 3.21 (0.881) 3.00 0.416
 C12 BMJ Clinical Evidence 0.492 3.23 (0.868) 3.00 2.90 (0.997) 3.00 0.379
 K1 Systematic review 0.774 0.866 4.19 (0.775) 4.00 4.23(0.814) 4.00 0.421
 K2 Meta-analysis 0.718 0.887 2.79(0.516) 3.00 4.10(0.793) 4.00 0.463
 K3 Case-control study 0.826 0.848 2.91(0.373) 3.00 4.28(0.681) 4.00 0.497
 K4 Randomized controlled trial 0.777 0.866 2.93(0.346) 3.00 4.37(0.686) 4.00 0.522
 K5 Relative risk 0.747 0.927 2.77(0.535) 3.00 4.04(0.741) 3.00 0.450
 K6 Absolute risk 0.763 0.926 2.74(0.554) 3.00 4.01(0.775) 4.00 0.561
 K7 Odds ratio 0.742 0.926 2.58(0.634) 3.00 3.82(0.822) 4.00 0.506
 K8 P-value 0.713 0.927 2.67(0.616) 3.00 4.00(0.803) 4.00 0.487
 K9 Level of evidence 0.721 0.927 2.75(0.538) 3.00 4.06(0.846) 4.00 0.359
 K10 Number needed to treat 0.676 0.929 2.67(0.599) 3.00 3.95(0.943) 4.00 0.528
 K11 Confidence interval 0.757 0.926 2.49(0.699) 3.00 3.78(0.882) 4.00 0.529
 K12 Heterogeneity 0.663 0.930 2.39(0.713) 3.00 3.54(0.950) 4.00 0.483
 K13 Publication bias 0.686 0.929 2.42(0.729) 3.00 3.58(0.997) 4.00 0.580
 K14 Test sensitivity and specificity 0.697 0.928 2.79(0.512) 3.00 4.24(0.734) 4.00 0.504
 K15 Positive predictive value 0.707 0.928 2.74(0.522) 3.00 4.06(0.861) 4.00 0.503
 K16 Clinical effectiveness 0.667 0.929 2.63(0.630) 3.00 2.89(0.938) 4.00 0.570
Practice Domain
 P1 I support EBM 0.417 0.875 2.94 (0.279) 3.00 4.43 (0.648) 4.00 0.605
 P2 I trust the findings from research studies 0.618 0.854 4.02 (0.683) 4.00 4.09 (0.611) 4.00 0.323
 P3 Reading research papers is important to me 0.684 0.846 4.06 (0.687) 4.00 4.06 (0.679) 4.00 0.477
 P4 EBM improves my patient care 0.765 0.838 4.18 (0.642) 4.00 4.27 (0.626) 4.00 0.301
 P5 EBM reduces my workload 0.499 0.877 3.44 (0.898) 3.00 3.43 (0.830) 3.00 0.532
 P6 I can implement EBM in my clinical practice 0.682 0.846 4.04 (0.661) 4.00 3.90 (0.743) 4.00 0.532
 P7 EBM guides my clinical decision making 0.748 0.841 4.18 (0.607) 4.00 4.10 (0.600) 4.00 0.344
 P8 I prefer to manage patients based on EBM 0.699 0.844 4.01 (0.713) 4.00 4.02 (0.689) 4.00 0.422
Barrier Domain
 B1 I am able to assess the quality of research. 0.472 0.747 2.31 (0.736) 2.00 3.34 (0.808) 3.00 0.475
 B2 I have access to internet to practice EBM 0.386 0.767 2.81 (0.497) 3.00 3.83 (0.874) 4.00 0.388
 B3 I have time to read research papers 0.546 0.728 3.32 (0.803) 3.00 3.29 (0.795) 3.00 0.494
 B4 I have time to practise EBM in my clinic 0.583 0.718 3.55 (0.810) 4.00 3.45 (0.774) 4.00 0.356
 B5 My clinic facilities are adequate to support the practice of EBM 0.583 0.718 3.13 (0.894) 3.00 3.30 (2.367) 3.00 0.142
 B6 Research articles are easily available to me 0.547 0.731 3.16 (0.982) 3.00 3.06 (0.942) 3.00 0.275
 B8 My patients prefers me to practise EBM 0.569 3.14 (0.798) 3.00 3.24 (0.690) 3.00 0.323
 B9 My patient believes in information that is based on evidence 0.569 3.29 (0.853) 3.00 3.41 (0.717) 3.00 0.547
 B12 My colleagues support the practice of EBM 0.618 3.53 (0.795) 4.00 3.53 (0.752) 4.00 0.620
 B13 My organization supports the practice of EBM 0.618 3.63 (0.756) 4.00 3.53 (0.771) 4.00 0.471
  1. ICC Intraclass correlation
  2. *Statistically significant at p < 0.05