Fig 1.
Study identification, inclusion, and exclusion for meta-analysis.
Table 1.
Main Characteristics of Selected Studies.
Table 2.
Quality Assessment for 8 studies (QUADAS-2).
Fig 2.
Graphical Display of 8 studies results (QUADAS-2).
Fig 3.
Forest plots of the sensitivity and specificity for serum LBP level across all included studies.
Fig 4.
Hierarchical summary receiver operating characteristic plot of serum LBP level across all included studies.
1: Axel Nierhaus 2013 [11]; 2: Y.Sakr 2008 [7]; 3: M.Prucha 2003 [9]; 4: M.Tromp 2012 [13]; 5: S.Gaini 2007 [15]; 6: P.Gille-Johnson 2012 [14]; 7: Franz Ratzingerl 2013 [12]; 8: Iwan A.Meynaar 2011 [16]
Table 3.
The results of univariable meta-regressions.
Fig 5.
Deeks’ funnel plot asymmetry test for publication bias.