study n substance dose route time caf_ng caf_ng_se caf caf_se caf_sd px_ng pg_ng_se px px_se px_sd px_caf px_caf_se px_caf_sd Tanaka2014 4 caffeine 100 oral 0.0 1270.59 588.24 1.27 0.59 1.18 635.29 176.47 0.64 0.18 0.35 0.5 0.3071 0.6141 Tanaka2014 4 caffeine 100 oral 0.5 3247.06 1905.88 3.25 1.91 3.81 1294.12 317.65 1.29 0.32 0.64 0.4 0.7701 1.5401 Tanaka2014 4 caffeine 100 oral 1.0 3929.41 1505.88 3.93 1.51 3.01 1458.82 317.65 1.46 0.32 0.64 0.37 0.5714 1.1427 Tanaka2014 4 caffeine 100 oral 1.5 4047.06 1105.88 4.05 1.11 2.21 1458.82 1.46 0.36 Tanaka2014 4 caffeine 100 oral 2.0 3788.24 1105.88 3.79 1.11 2.21 1247.06 152.94 1.25 0.15 0.31 0.33 0.3675 0.735 Tanaka2014 4 caffeine 100 oral 3.0 3858.82 1529.41 3.86 1.53 3.06 1176.47 176.47 1.18 0.18 0.35 0.3 0.4694 0.9388 Tanaka2014 4 caffeine 100 oral 4.0 3529.41 1152.94 3.53 1.15 2.31 1129.41 282.35 1.13 0.28 0.56 0.32 0.3798 0.7597 Tanaka2014 4 caffeine 100 oral 6.0 3152.94 1011.76 3.15 1.01 2.02 941.18 305.88 0.94 0.31 0.61 0.3 0.3155 0.631 Tanaka2014 4 caffeine 100 oral 8.0 2470.59 1082.35 2.47 1.08 2.16 776.47 305.88 0.78 0.31 0.61 0.31 0.3535 0.707