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Table 1 General characteristics of the included studies

From: Laparoscopic versus open surgery for pheochromocytoma: a meta-analysis

Author-year Country Study type Gender (M/F) Age (yr)c BMI (kg/m2)c Quality scored
LS OS LS OS LS OS
Tiberio-2008 Italy RCT 7/6 7/2 51 (37–74) 51 (34–61) NR NR /
Inabnet-2000 France RS 3/8 4/7 51.4± 10.0 45.7±14.0 NR NR 8
Kim-2004 Korea RS 8/7 5/4 45.2 (30-58) 43.3 (23-66) 24.2±1.8a 24±1.2a 7
Zhu-2019 China RS 24/22 28/18 48.15±12.68 45.17±10.29 21.62±2.70 21.67±2.73 8
Bai-2019 China RS 27/37 31/33 51.9 ± 13.3 51.7 ± 13.4 23.4(20.4-25.1)b 23.1(20.2-26.1)b 8
Sprung-2000 America RS 5/9 8/12 57 ± 15 46 ± 17 NR NR 7
Tanaka-2000 Japan RS NR NR 39.5 (16-50) 38 (15-63) NR NR 7
Lang-2008 China RS 30/23 26/24 36.2±12.5 35.4±14.1 23.3±1.3 23.5±1.4 8
Edwin-2001 Russia RS NR NR 52 (31–65) 45 (24–65) NR NR 7
Wang-2011 China RS 11/15 14/9 42.4 ± 11.7 37.5 ± 16.3 23.5 ± 2.96 23.0 ± 3.46 7
Davies-2004 Victoria RS 6/6 7/5 54±15 52±22 NR NR 8
Kazaryan-2004 Russia RS 5/4 9/13 48 ± 12 44 ± 12 NR NR 8
Song-2012 China RS 13/10 16/9 32-67 28-62 NR NR 7
Barband-2008 Iran RS 5/5 6/4 36±13.7 42.3±15.2 24.7±2.3 26.2±1.7 8
  1. BMI Body mass index, F Female, M Male, LS Laparoscopic surgery, OS Open surgery, NR Not reported, RCT Randomized controlled trials, RS Retrospective study
  2. aThe data are expressed as the mean ± standard error
  3. bNon-normal continuous variables are expressed as the median (interquartile range)
  4. cThe data are expressed as the mean ± SD or medians (range)
  5. dAccording to the Newcastle-Ottawa scale classification