6. League table for treatment network: results of network meta‐analysis with GRADE assessment (below diagonal) and available pairwise meta‐analyses (above diagonal)^a.

Reactive water surfaces			1.07 (0.70 to 1.64)
1.03 (0.27 to 3.98) ⊕⊝⊝⊝ VERY LOWb,c	Alternating pressure (active) air surfaces		0.97 (0.26 to 3.58)
0.76 (0.48 to 1.19) ⊕⊝⊝⊝ VERY LOWc,d	0.74 (0.19 to 2.82) ⊕⊝⊝⊝ VERY LOWc,d	Reactive air surfaces	1.32 (0.96 to 1.80)
1.00 (0.72 to 1.38) ⊕⊝⊝⊝ VERY LOWb,c	0.97 (0.26 to 3.58) ⊕⊝⊝⊝ VERY LOWb,c	1.32 (0.96 to 1.80) ⊕⊕⊝⊝ LOWc	Foam surfaces

^a Results of available pairwise meta‐analyses are presented in the upper right triangle above the diagonal, results of network meta‐analysis with GRADE assessment are presented in the lower left triangle. All results are RRs and their 95% CIs. For each cell, the RR and CI correspond to support surfaces in the same row and column, with the top‐left support surface compared to the lower right support surface in each case.
^bDowngraded twice for risk of bias.
^cDowngraded twice for imprecision.
^dDowngraded once for risk of bias.