The Effectiveness of Zinc Supplementation in Taste Disorder Treatment: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Table 4

A systematic review meta-analysis—GRADE score results for all.

Lead author	Publication date	Risk of bias	Imprecision	Inconsistency	Indirectness	Publication bias
Ikeda et al. [23]	2013	⊕⊕⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕⊕	N/A
Sakai et al. [28]	2002	⊕⊕	No CI reported	N/A	⊕⊕⊕	N/A
Yoshida et al. [29]	1990	⊕⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕	N/A
Henkin et al. [34]	1976	⊕⊕⊕	No CI reported	N/A	N/A	N/A
Sakagami et al. [24]	2009	⊕⊕⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕⊕	N/A
Heckmann et al. [26]	2005	⊕⊕⊕⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕	N/A
Stewart-Knox et al. [25]	2008	⊕⊕	No CI reported	N/A	N/A	N/A
Mahajan et al. [32]	1979	⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕⊕	N/A
Mahajan et al. [30]	1982	⊕⊕⊕⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕⊕	N/A
Mahajan et al. [31]	1980	⊕⊕⊕⊕	No CI reported	⊕⊕⊕⊕	⊕⊕⊕	N/A
Atkin-Thor et al. [33]	1978	⊕⊕	No CI reported	⊕⊕	⊕⊕	N/A
Matson et al. [27]	2003	⊕⊕⊕	No CI reported	⊕⊕	⊕⊕⊕⊕	N/A

Notes. N/A-not a systematic review. N/A-not applicable, CI‐confidence interval. High: ⊕⊕⊕⊕, Moderate: ⊕⊕⊕, Low: ⊕⊕, Very Low: ⊕.