Table S3.9: Predicting the prevalence of categories related to 'thoroughness'. The sample is limited to reviews consisting of at least 10 sentences. 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)	9.88 (0.49)***	7.64 (0.38)***	3.62 (0.23)***	1.92 (0.12)***
JIF group: 2 (ref.: JIF group: 1)	1.47 (0.67)*	0.91 (0.52)	0.54 (0.31)	0.10 (0.17)
JIF group: 3	1.31 (0.71)	0.17 (0.55)	0.50 (0.33)	0.17 (0.18)
JIF group: 4	2.65 (0.71)***	0.55 (0.56)	0.89 (0.33)**	0.15 (0.18)
JIF group: 5	3.09 (0.69)***	0.88 (0.53)	1.05 (0.32)**	0.11 (0.18)
JIF group: 6	2.74 (0.70)***	0.28 (0.54)	0.47 (0.33)	-0.10 (0.18)
JIF group: 7	3.99 (0.69)***	0.66 (0.54)	1.20 (0.32)***	0.20 (0.18)
JIF group: 8	3.11 (0.70)***	-0.08 (0.55)	0.93 (0.33)**	0.22 (0.18)
JIF group: 9	3.72 (0.73)***	0.08 (0.57)	1.05 (0.34)**	0.22 (0.19)
JIF group: 10	5.22 (0.71)***	-0.10 (0.55)	1.08 (0.33)**	0.56 (0.18)**
AIC	47758.44	44617.36	37566.60	28476.72
Log Likelihood	-23866.22	-22295.68	-18770.30	-14225.36
N	6510	6510	6510	6510
N groups: Journal ID	1457	1457	1457	1457
N groups: Reviewer ID	6157	6157	6157	6157
***p < 0.001; **p < 0.01; *p < 0.05