Table S3.5: Predicting the prevalence of categories related to 'thoroughness'. Models exclude reviews without mentions of a content category. Table shows coefficients from negative binomial regression models. Standard errors in parentheses.

	Materials and Methods	Presentation and Reporting	Results and Discussion	Importance and Relevance
(Intercept)	7.41 (0.42)***	5.69 (0.30)***	3.35 (0.20)***	2.15 (0.11)***
JIF group: 2 (ref.: JIF group: 1)	1.59 (0.59)**	1.31 (0.43)**	0.56 (0.28)*	0.15 (0.15)
JIF group: 3	1.26 (0.62)*	0.47 (0.45)	0.53 (0.30)	0.19 (0.16)
JIF group: 4	2.41 (0.63)***	1.03 (0.46)*	0.83 (0.30)**	0.24 (0.16)
JIF group: 5	2.96 (0.60)***	1.45 (0.44)**	1.17 (0.29)***	0.18 (0.15)
JIF group: 6	2.67 (0.62)***	1.07 (0.45)*	0.70 (0.29)*	0.02 (0.16)
JIF group: 7	3.89 (0.62)***	1.36 (0.45)**	1.31 (0.29)***	0.24 (0.16)
JIF group: 8	3.57 (0.64)***	0.99 (0.46)*	1.11 (0.30)***	0.23 (0.16)
JIF group: 9	4.24 (0.68)***	1.24 (0.49)*	1.32 (0.32)***	0.33 (0.17)
JIF group: 10	5.87 (0.65)***	1.28 (0.47)**	1.40 (0.30)***	0.66 (0.16)***
AIC	65595.05	58254.03	42347.80	27937.02
Log Likelihood	-32784.52	-29114.01	-21160.90	-13955.51
N	9070	8717	7528	6693
N groups: Journal ID	1582	1582	1496	1475
N groups: Reviewer ID	8446	8139	7073	6350
***p < 0.001; **p < 0.01; *p < 0.05