Table 1.
Basic Characteristics of the Included Studies
| Study | Year | Design | Sample Size | Mean age(years) | Tumor Size(cm) | BMI (kg/m2) | Neoadjuvant therapy (sample size) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LPD | OPD | LPD | OPD | LPD | OPD | LPD | OPD | LPD | OPD | |||
| Croome | 2014 | P,S | 108 | 214 | 66.6 | 65.4 | 3.3a | 3.3a | 27.4a | 27.2a | 12 | 30 |
| Speicher | 2014 | R,S | 25 | 84 | 61 | 64 | 2b | 3b | 24b | 25b | 9 | 26 |
| Sharpe | 2015 | R,M | 384 | 4037 | 65.6 | 66.1 | 3.2a | 3.3a | NA | NA | NA | NA |
| Stauffer | 2016 | P,S | 58 | 193 | 66.9 | 68.9 | 2.5b | 3.5b | 25.9b | 25.6b | NA | NA |
| Champman | 2017 | R,M | 248 | 1520 | 79.6 | 79.5 | NA | NA | NA | NA | 175 | 83 |
| Kantor | 2017 | R,M | 828 | 7385 | 65.9 | 65.7 | NA | NA | NA | NA | 642 | 5714 |
| Chen | 2018 | R,S | 47 | 55 | 63 | 66 | NA | AN | 24a | 22.7a | NA | NA |
| Dokmak | 2015 | P,S | 46 | 46 | 60 | 63 | 2.82a | 2.51a | 22.6a | 26.4a | NA | NA |
P prospective study S single center R retrospective study M mutli-centers NA not avaliable BMI body mass index aMean bMedian