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Table 3 The effect of zinc acetate lozenges on common cold symptoms in the Prasad et al. (2008) study [23]

From: The effectiveness of high dose zinc acetate lozenges on various common cold symptoms: a meta-analysis

  Treatment group   
  Zinc Placebo Effect of zinc Effect of zinc
  (Days; mean) (Days; mean) (Days; mean, 95% CI) (%; mean, 95% CI)
Total duration 4.00 7.12 −3.12 (−2.48, −3.76) −43% (−34%, −53%)
Nasal discharge 3.00 4.56 −1.56 (−0.22, −2.90) −34% (−4%, −64%)
Cough 2.16 5.08 −2.92 (−1.58, −4.26) −57% (−30%, −84%)
Muscle ache 0.80 2.00 −1.20 (−0.20, −2.20) −60% (−9%, −110%)