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Table 1: Absolute CBF in low- and high-grade tumors with associated results from meta-analysis of mean data^{^a}
Study High-Grade Tumors Low-Grade Tumors Weight Mean Difference, IV, Random-Effects, 95% CI (aCBF)
Mean aCBF SD Total (No.) Mean aCBF SD Total (No.)
Dangouloff-Ros et al, 2015²⁷ 239 94.75 2 81.14 33.92 7 1.90% 157.86 (24.16–291.56)
Dangouloff-Ros et al, 2016¹⁷ 80.12 47.31 65 31.6 10.39 52 24.20% 48.52 (36.68–60.36)
Hales et al, 2013²⁸ 111.5 2.12 2 80.33 29.66 6 18.80% 31.17 (7.26–55.08)
Kikuchi et al, (2017)³³ 46.33 22.89 7 19.89 21.33 11 20.10% 26.44 (5.31–47.57)
Liu et al, (2015)²⁹ 53.52 17.4 6 47.32 14.74 6 21.50% 6.20 (−12.05–24.45)
Morana et al, (2017)³⁰ 0 0 0 0 0 0 Not estimable
Vidyasagar et al, (2016)³¹ 68.75 31.77 4 51.3 42.87 19 13.50% 17.45 (−19.17–54.07)
Yeom et al, (2014)³² 0 0 0 0 0 0 Not estimable
Total (95% CI) 86 101 100% 29.62 (10.43–48.82)
Note:—IV indicates inverse variance.
↵a Heterogeneity: τ² = 360.34, χ² = 19.31, df = 5 (P = .002); I² = 46%; Test for overall effect: Z = 3.03 (P = .002).