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Table 3 Exploratory factor analysis 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

Original domains After EFA was performed Item No. Item Factor 1 Factor 2 Factor 3 KMO AVE (%) Bartlett’s test CR
Knowledge Evidence-based medicine websites
(n = 6)
C6 Centre of Evidence-Based Medicine (CEBM) 0.605 0.834 43.0 < 0.001 0.662
C10 ACP Journal Club 0.583
C5 Database of abstracts of reviews of effectiveness (DARE) 0.550
C13 InfoClinics 0.545
C2 Bandolier (published in Oxford) 0.495
C14 Centre of Reviews & Dissertation 0.477
Evidence-based journals
(n = 2)
C12 BMJ Clinical Evidence 0.665 0.500 48.9 < 0.001 0.609
C3 Evidence-Based Medicine (from BMJ publishing group) 0.658
Type of studies (n = 4) K3 Case-control study 0.654 0.692 49.7 < 0.001 0.685
K4 Randomized controlled trial 0.632
K1 Systematic review 0.622
K2 Meta-analysis 0.459
Terms related to EBM
(n = 12)
K13 Publication bias 0.956 0.896 52.0 < 0.001 0.884
K11 Confidence interval 0.817
K12 Heterogeneity 0.745
K16 Clinical effectiveness 0.642
K7 Odds ratio 0.607
K8 P-value 0.589
K15 Positive predictive value 0.569
K14 Test sensitivity and specificity 0.553
K10 Number needed to treat 0.531
K9 Level of evidence 0.524
K6 Absolute risk 0.436
   K5 Relative risk 0.416     
Practice (n = 9) Practice (n = 8) P4 EBM improves my patient care 0.829 0.892 49.0 < 0.001 0.882
P7 EBM guides my clinical decision making 0.817
P8 I prefer to manage patients based on EBM 0.759
P3 Reading research papers is important to me 0.739
P6 I can implement EBM in my clinical practice 0.727
P2 I trust the findings from research studies 0.662
P5 EBM reduces my workload 0.521
P1 I support EBM 0.456
Barriers
(n = 13)
Access
(n = 6)
B4 I have time to practise EBM in my clinic 0.686   0.818 36.8 < 0.001 0.774
B5 My clinic facilities are adequate to support the practice of EBM 0.675
B3 I have time to read research papers 0.633  
B6 Research articles are easily available to me 0.632
B1 I am able to assess the quality of research. 0.543
B2 I have access to internet to practice EBM 0.435   
Patient preferences
(n = 2)
B8 My patients prefers me to practise EBM 0.754
B9 My patient believes in information that is based on evidence 0.754 0.500 56.8 < 0.001 0.725
  Support
(n = 2)
B12 My colleagues support the practice of EBM 0.786
B13 My organization supports the practice of EBM 0.786 0.500 61.7 < 0.001 0.764
  1. EBM Evidence-based medicine, EFA Exploratory Factor Analysis, KMO Keiser-Meyer-Olkin, AVE Average Variance Extracted, CR Composite Reliability