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Table 2 Performance analysis of control strategies, both isolated and combined, based on the levels of significance of each study (p-value)

From: Meta-analysis of studies on chemical, physical and biological agents in the control of Aedes aegypti

Statistics Biological Chemical Integrated Global
Number of studies 5a 5b 12 22
Chi-square (w) 72.5071 57.2704 140.0351 277.3397
Degrees of freedom 10 10 24 44
p-value (w) <0.0001 < 0.0001 < 0.0001 < 0.0001
  1. aFor the small amount of articles (<5) for the biological subgroup meta-analysis, an article about fish x educational campaign was considered as biological
  2. bOne of the studies tested permethrin Cis and Beta, providing two p-values. The two values were used for the meta-analysis of subgroups (covering 4–5 articles)