Table 1. Summary of the characteristics of enrolled studies.
| Study | Country | Patients | Study period | Age (range), yr | Gender (m/f) | Cut off (Present/High grade) | FU (range), mon | NOS score |
|---|---|---|---|---|---|---|---|---|
| Cho˙2007 | Korea | 104 | 1986–2004 | Md = 65(25–91) | 66/38 | Grade 0/1/2 vs. 3/4 on CT, EU, US | Md = 44(6–214) | 7 |
| Chapman˙2009 | USA | 308 | 1996–2006 | Mn = 66.4(29.7–90.4) | 236/72 | Absence vs. presence on CT, US, MRI, IVU | NA | 8 |
| Ng˙2011 | USA | 106 | 1993–2005 | Md = 69(36–90) | 67/39 | Absence vs. presence on CT | Md = 47(1–164) | 8 |
| Messer˙2013 | USA | 408 | 1997–2008 | Md = 69.1(IQR, 15.5) | 254/154 | Mild/moderate vs. severe on CT, MRI, IVP, US | NA | 7 |
| Bozzini˙2013 | France | 401 | 1995–2010 | Md = 69.0(IQR, 60.0-76.0) | 249/152 | Absence vs. presence on CT, MRI, IVU | Md = 26(IQR, 9.0–49.0) | 8 |
| Zhang˙2013 | China | 217 | 2000–2010 | Md = 69(62–81) | 130/87 | Absence vs. presence on CT, MRI, IVP, US | Md = 52 | 8 |
| Hwang˙2013 | Korea | 114 | 2004–2010 | Md = 71(41–84) | 88/26 | None/mild vs. moderate/severe on CT, EU, US | Md = 26.5 (23.5–31) | 8 |
| Luo˙2013 | Taiwan | 162 | 2005–2010 | Mn = 67.97 | 81/81 | Grade 0/1/2 vs. 3/4 on urology radiologists | Md = 36.87 | 8 |
| Sakano˙2013 | Japan | 536 | 1995–2009 | Md = 71(32–93) | 370/166 | Absence vs. presence | Md = 40.9(3–200) | 7 |
| Chen˙2013 | China | 729 | 2002–2010 | Mn = 66.5(20–94) | 318/411 | Absence vs. presence on CT, MRI, IVU | NA | 7 |
| Zou˙2014 | China | 122 | 1999–2013 | Md = 64(35–80) | 87/35 | Absence vs. presence | Md = 53(3–159) | 8 |
| Colin˙2014 | France | 151 | 1995–2010 | Md = 72.5 (IQR, 63.4–78.1) | 98/53 | Absence vs. presence | Md = 18.5(IQR, 9.5–37.9) | 6 |
| Fradet ˙2014 | Canada | 743 | 1990–2010 | Mn = 69.7 | 438/304 | Absence vs. presence | Md = 24.8(IQR, 7.69–56.76) | 6 |
| Chung˙2014 | USA | 141 | 1998–2013 | Md = 70(35–92) | 91/50 | None/mild vs. moderate/severe on CT, IVP, US | Md = 34(1–149) | 8 |
| Yeh˙2015 | Taiwan | 472 | 1991–2013 | Md = 67(24–95) | 204/268 | Absence vs. presence on CT | Md = 33(1–233) | 7 |
| Zhang˙2015 | China | 520 | 2000–2010 | NA | 229/291 | Absence vs. presence on CT, MRI | Md = 54(12–151) | 8 |
| Liang˙2016 | China | 172 | 2001–2014 | Md = 70(IQR, 63–77) | 105/67 | None/mild vs. severe on CT, MRI, US | Md = 44(IQR, 24–62) | 7 |
| Xing˙2016 | China | 192 | 2000–2013 | NA | 114/78 | Absence vs. presence on CT, US | Md = 65(3–144) | 8 |
| Zhang˙2016 | China | 184 | 2006–2008 | Md = 70(61–75) | 84/100 | Absence vs. presence on CT, MRI, US | Md = 78(34–92) | 8 |
Notes.
Abbreviations
- CT
- computed tomography
- EU
- excretory urography
- FU
- follow-up
- IQR
- interquartile range
- IVP
- intravenous pyelogram
- IVU
- intravenous urograms
- Md
- median
- Mn
- mean
- MRI
- magnetic resonance imaging
- NA
- not available
- US
- ultrasound
- mon
- month
- yr
- year