Table 4 Regression analysis of individual quality criteria versus year-of-publication of the manuscripts identified by the CIG Trials Registry This table lists the results of the regression analyses comparing year-of-publication against the individual quality criteria.
quality criterion | regression result (W = Wald stat) | Cox & Snell R2 | regression line |
|---|---|---|---|
the assessment of the distribution of patient characteristics and prognostic factors between groups | W = 5.53, P = 0.02 | 0.03 | y = 0.072x - 4.71 |
prevention of the movement of patients between groups after allocation, and the use of intention-to-treat analysis | W = 4.74, P = 0.03 | 0.03 | y = 0.054x - 13.25 |
the blinding of the patients to the treatment they received | W = 0.04, P = 0.84 | 0.000 | y = 0.006x + 0.77 |
the blinding of the health care providers to the treatments received by the patients | W = 0.16, P = 0.69 | 0.001 | y = -0.010x + 0.32 |
the blinding of the outcome observer to the treatment received by the patient | W = 0.27, P = 0.60 | 0.002 | y = 0.012x - 0.57 |
adequacy of follow-up | W = 3.25, P = 0.07 | 0.02 | y = 0.043x - 3.25 |
allocation concealment | W = 0.23, P = 0.88 | 0.000 | Y = 0.004x - 7.64 |