Table 2. Results of meta-analyses per year over journal.

Year	Introduction	Methods	Results	Discussion	Total	Tables	Figures	References	Suppl
2005	3.19 ± 0.53	9.27 ± 1.59	8.61 ± 1.49	7.72 ± 0.94	28.55 ± 2.68	3.27 ± 0.72	1.87 ± 0.62	30.65 ± 4.77	0.34 ± 0.13
2010	3.08 ± 0.49	10.85 ± 1.64	8.84 ± 1.70	8.19 ± 1.23	31.41 ± 3.01	3.18 ± 0.66	2.45 ± 0.77	35.08 ± 5.60	0.73 ± 0.09
2015	3.36 ± 0.45	11.36 ± 1.89	9.61 ± 1.62	8.29 ± 1.26	32.76 ± 3.49	2.90 ± 0.57	2.55 ± 0.67	34.34 ± 6.25	0.97 ± 0.02
All years	3.22 ± 0.28	10.39 ± 0.98	9.00 ± 0.92	8.00 ± 0.64	30.54 ± 1.74	3.08 ± 0.37	2.26 ± 0.39	32.97 ± 3.14	0.67 ± 0.11
Change per year	0.03	0.29	0.14	0.08	0.54	-0.02	0.08	0.75	0.06
95% CI	0.00–0.06	0.19–0.39	0.04–0.23	0.01–0.16	0.35–0.73	-0.06–0.02	0.03–0.13	0.30–1.20	0.05–0.07
p-value	0.050	< 0.001	0.004	0.036	< 0.001	0.336	0.001	0.001	< 0.001

Pooled means and respective standard errors for the number of paragraphs per section, the total number of paragraphs (Total), the number of tables, figures and references from DerSimonian and Laird [14] meta-analysis per year over journals. The proportion of articles with supplementary material (Suppl) is displayed in the last column. The change in the number of paragraphs per year/percent of articles with supplementary material per year from a linear mixed model is displayed together with its 95% confidence interval (95% CI) and p-value.