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Table 3 Multivariable linear regression of sum of difficulties in clinical research

From: Patient enrollment and logistical problems top the list of difficulties in clinical research: a cross-sectional survey

  All difficulties (15 items) Scientific difficulties (7 items) Logistical difficulties (7 items)
Study characteristics: Difference 95 % CI Difference 95 % CI Difference 95 % CI
Public sponsorshipa (vs. private) 1.3 0.4,2.1 0.9 0.4,1.3 0.4 -0.1,0.9
Single center study (vs. multicenter) 0.8 0.1,1.5 0.6 0.2,1.0 0.3 -0.1,0.7
“Clinical” studyb (vs. otherc) 0.7 0.0,1.3 0.1 -0.2,0.5 0.6 0.3,1.0
  1. Difference = beta coefficients; CI = confidence interval
  2. aPublic hospital, University
  3. b Intervention or diagnosis or prognosis studies
  4. chealth/illness, public health/health economics, methods, other