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Table 14 Summary of the simple regression models for each of the four moderator variables on target species biomass

From: Evaluating the biological effectiveness of fully and partially protected marine areas

Moderator variable N oMPAs Slope [95% CI] Q M, p-val
MPA age (year) 14 0.03 [−0.005 → 0.07] QM = 2.89, p = 0.09
Size ratio (NTR:PPA) 11 −0.35 [−0.92 → 0.22] QM = 1.45, p = 0.23
Log(distance NTR to PPA) 14 −0.09 [−0.19 → 0.02] QM = 2.82, p = 0.09
# species combined 14 0.002 [−0.10 → 0.11] QM = 0.001, p = 0.98
Sensitivity analysis; habitat confounded studies excluded
# species combined 10 0.10 [0.02 → 0.19] QM = 5.75, p = 0.02
  1. Effect sizes are weighted by the variance of the mean of several correlated variables calculated for correlation coefficients of rho = 0.5. Data under sensitivity analysis is given only for the moderator variable which showed considerable different result from when all studies were included.