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Table 2 Credibility ratings by ghostwriting condition

From: Knowledge of undisclosed corporate authorship (“ghostwriting”) reduces the perceived credibility of antidepressant research: a randomized vignette study with experienced nurses

Outcome Variable

No Ghostwriting (n = 35)

Ghostwriting (n = 32)

P-value*

Difference of Medians (95% CI)*

 

Mean ± SD

Median

Mean ± SD

Median

  

Truthful

4.54 ±1.25

5.00

3.28 ±1.78

3.00

.003

 

Accurate

4.23 ±1.21

4.00

3.72 ±1.76

3.50

.144

 

Credible

4.14 ±1.26

4.00

2.84 ±1.78

2.50

.001

 

Honest

4.46 ±1.42

4.00

2.53 ±1.90

2.00

<.001

 

Sincere

4.63 ±1.37

5.00

3.00 ±1.95

2.00

<.001

 

Overall Credibility Scale Total

22.00 ±5.87

23.00

15.37 ±7.85

13.00

<.001

9.00 (4.00 – 12.00)

  1. *As calculated using the Mann–Whitney U test.
  2. Out of an achievable scale total of 35 points.