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Table 2 Meta-analysis of baseline BSI, ΔBSI and subgroup for OS

From: Prognostic value of the bone scan index in patients with metastatic castration-resistant prostate cancer: a systematic review and meta-analysis

Stratified analysisSubgroupNo. of studiesP (heterogeneity)I2 (%)Effect modelHR(95% CI)P-valueBegg’s test
Baseline BSIOverall70.00172.4Random1.3311.081–1.6400.0070.764
EthnicityCaucasian20.00985.3Random1.1020.906–1.3390.331 
 Asian70.4850Random1.6881.297–2.197< 0.001 
Cut-off≤ 160.27422.8Random1.331.072–1.6500.009 
 >  130.00978.9Random1.4890.852–2.6040.162 
ΔBSIOverall50.02763.4Random1.221.015–1.4670.0340.462
EthnicityCaucasian20.09763.7Random1.0990.950–1.2720.204 
 Asian30.3770Random1.491.137–1.9540.004