Time series of Manuscript STROBE scores (MSS) from spline linear regression models.

<p>Time series of Manuscript STROBE scores (MSS) from spline linear regression models.</p

Summary of quality of reporting as assessed using the Manuscript STROBE Score (MSS).

<p>Summary of quality of reporting as assessed using the Manuscript STROBE Score (MSS).</p

Summary of pre and post-STROBE period Manuscript STROBE score (MSS), Manuscript NOS score (MNOS), Manuscript SIGN score (MSiS) & Manuscript CASP score (MCAS) by article.

<p>The citations for the manuscripts are listed in online supplementary material (Item B in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0155078#pone.0155078.s001" target="_blank">S1 File</a>).</p

PRISMA flow diagram.

<p>PRISMA flow diagram.</p

Quality of the reporting of observational studies as assessed using the Manuscript STROBE score (MSS) over time.

<p>Quality of the reporting of observational studies as assessed using the Manuscript STROBE score (MSS) over time.</p

Median STROBE QUESTION SCORE (SQS), Difference (95% CI) with p value of the 55 data items (22 items were further sub-divided to 55 questions in total) in 37 CKD cohort studies, by publication period.

<p>Median STROBE QUESTION SCORE (SQS), Difference (95% CI) with p value of the 55 data items (22 items were further sub-divided to 55 questions in total) in 37 CKD cohort studies, by publication period.</p

Box plot summarising methodological quality of the studies in the Pre and Post-STROBE period as assessed using the NOS, CASP and SIGN.

<p>Box plot summarising methodological quality of the studies in the Pre and Post-STROBE period as assessed using the NOS, CASP and SIGN.</p