Of the non‐significant associations, four studies showed a decrease that did not reach statistical significance at P < 0.05, and two showed a non‐significant increase (Appendix S1 ).
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0.0500
0.0500
Of the non‐significant associations, four studies showed a decrease that did not reach statistical significance at P < 0.05, and two showed a non‐significant increase (Appendix S1 ).