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

	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%