Subgroup | Category | Included studies | Sample size | Test for overall effect | ||
---|---|---|---|---|---|---|
CRTS | SA | RR (95% CI) | P | |||
Postoperative mortality based on ethnicity | The West | 5 | 377 | 417 | 0.83 [0.47, 1.46] | 0.52 |
The East | 2 | 115 | 128 | 0.56 [0.42, 0.75] | <0.0001 | |
Postoperative complication based on ethnicity | The West | 4 | 209 | 231 | 1.00 [0.87, 1.15] | 0.98 |
The East | 5 | 357 | 387 | 1.23 [0.96, 1.56] | 0.10 | |
Local recurrence based on ethnicity | The West | 4 | 283 | 279 | 0.51 [0.34, 0.76] | 0.001 |
The East | 4 | 201 | 202 | 0.52 [0.33, 0.84] | 0.008 | |
Postoperative metastasis based on ethnicity | The West | 4 | 283 | 279 | 0.93 [0.75, 1.16] | 0.53 |
The East | 4 | 201 | 202 | 0.62 [0.44, 0.88] | 0.007 | |
Postoperative mortality based on histology | SCC | 7 | 231 | 247 | 0.54 [0.42, 0.68] | <0.0001 |
AC | 5 | 295 | 313 | 1.26 [0.76, 2.06] | 0.37 |