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Table 3 Frequency of reporting for individual questions. Only the questions with the largest differences in each comparison are shown; complete data is available in Table S6 (for the independent samples) and Table S7 (for the paired samples). As none of these items had articles scoring “Partially”, only the number and percentage of “Yes” answers are shown. Results are from Fisher’s exact tests (in the independent samples comparisons) and McNemar’s exact tests (in the paired comparisons). 95% C.I.; 95% confidence interval

From: Comparing quality of reporting between preprints and peer-reviewed articles in the biomedical literature

 

Preprint

Peer-reviewed

Odds ratio [95% C.I.]

p value

Independent samples

 Unit-level data

22

3

0.1 [0.02, 0.4]

4.5 × 10−5

29%

4.2%

 Animal source/supplier (Vertebrate)

12

22

7.6 [1.6, 49.9]

0.005

48%

88%

 Eligibility criteria (Human)

19

29

6.4 [1.5, 39.8]

0.008

59.4%

90.6%

 Randomization (Vertebrate)

0

8

∞ [2.0, ∞]

0.003

0%

47%

 Symbol meaning

27

45

4.9 [1.3, 23.0]

0.01

69.2%

91.8%

 Variation/precision measure

49

60

2.8 [1.2, 6.9]

0.01

66.2%

84.5%

 Conflict of interest statement

34

50

2.4 [1.2, 4.8]

0.01

44.7%

65.8%

Paired sample

 Conflict of interest statement

26

47

11.5 [2.8, 100.6]

1.9 × 10−5

46.4%

83.9%

 Funding source

50

55

∞ [0.9, ]

0.06

89.3%

98.2%

 Unit-level data

14

19

∞ [0.9, ∞]

0.06

25%

33.9%