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Table 4 Overview and characteristics of studies discussing BMI and biochemical recurrence of prostate cancer in Asia

From: Body mass index is associated with higher Gleason score and biochemical recurrence risk following radical prostatectomy in Chinese men: a retrospective cohort study and meta-analysis

Author, year [Ref]

Location

Patients

BMI (kg/m2)

HR (95 % CI)

HR per 5 kg/m2 increase of BMI (95 % CI)

Adjusted confoundersa

Bai 2015

China

N = 211, 2006–2014, FUT = 24.5 months

Continuous

1.145(1.029–1.273)

1.97(1.15–3.34)

1, 2, 7, 8

Ohwaki 2015 [15]

Japan

N = 283, 2008–2012, FUT = 30 months

≥25 vs. <25

0.83(0.40–1.72)

0.83(0.40–1.72)

1, 2, 7, 8

Koo 2014 [10]

Korea

N = 880, 2005–2011, FUT = 58.2 months

>23 vs. ≤23

0.63(0.46–0.89)

0.63(0.46–0.89)

2, 5, 6, 7, 8, 14

Hayashi 2014 [12]

Japan

N = 703, 2002–2009, FUT = 38.4 months

Continuous

1.07(1.01–1.14)

1.40(1.05–1.93)

1, 2, 7, 8, 9, 10, 15

Narita 2013 [9]

Japan

N = 1257, 2001–2009, FUT = 49 months

Continuous

0.987(0.940–1.035)

0.94(0.73–1.19)

1, 2, 7, 8, 9, 10, 11

Lee 2011 [13]

Korea

N = 512, 2003–2009, FUT = 37.8 months

Continuous

1.373(0.720–2.326)

4.88(0.19–68.08)

1, 2, 3, 7, 8, 9, 10

Komaru 2010 [14]

Japan

N = 173, 1997–2007, FUT = 35 months

≥25 vs. <25

1.398(0.694–2.817)

1.40(0.69–2.82)

None

Hisasue 2008 [8]

Japan

N = 126, 1998–2006, FUT = 17 months

≥26.4 vs. <26.4

3.53(1.289–9.677)

3.53(1.29–9.68)

1, 2, 4, 7, 8, 12, 13

  1. Ref reference, FUT follow-up time; other abbreviations as in Tables 1, 2, and 3
  2. aAdjusted confounders: 1, age; 2, preoperative PSA; 3, prostate volume; 4, clinical stage; 5, lymphovascular invasion; 6, perineural invasion; 7, pathological Gleason score; 8, positive surgical margin; 9, extraprostatic extension; 10, seminal vesicle invasion; 11, lymph node involvement; 12, surgical period; 13, total testosterone; 14, pathological T stage; 15, adjuvant radiotherapy