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. 2021 May 6;17(4):423–434. doi: 10.4103/jmas.JMAS_219_20

Table 3.

Meta-analysis results of all outcome indicators in the available studies

Measured Outcomes Subgroup No. studies No. Patients Heterogeneity Test Model RR/WMD 95% CI P

I2 (%) P
Operative time (min) RCT 8 1670 vs 1651 95 <0.00001 Random 43.08 26.11~60.05 <0.00001
RCS 23 2971 vs. 3545 97 <0.00001 Random 44.55 28.78~60.33 <0.00001
Proximal resection margin RCT 3 1254 vs 1238 0 0.89 Fixed -0.35 -0.55~-0.14 0.0008
RCS 8 1582 vs. 1884 21 0.26 Fixed -0.17 -0.33~0.00 0.05
Distal resection margin (cm) RCT 3 1254 vs 1238 0 0.89 Fixed -0.15 -0.36~0.05 0.14
RCS 7 1123 vs. 1446 28 0.21 Fixed 0.04 -0.12~0.21 0.6
Hospital stay (d) RCT 7 1625 vs. 1601 88 <0.00001 Random -0.91 -1.87~0.06 0.07
RCS 19 2916 vs. 3350 86 <0.00001 Random -2.45 -3.13~-1.77 <0.00001
Estimated blood loss (ml) RCT 6 1525 vs. 1505 93 <0.00001 Random -41.83 -69.24~-14.41 0.003
RCS 20 2784 vs. 3375 97 <0.00001 Rondom -95.99 -124.90~-67.07 <0.00001
Intraoperative transfusion RCT 3 903 vs 900 0 0.56 Random 0.77 0.56~1.05 0.1
RCS 7 1186 vs. 990 60 0.02 Random 0.5 0.32~0.78 0.002
Time to oral intake (d) RCT 6 1106 vs. 1081 83 <0.0001 Random -0.4 -0.78~-0.01 0.04
RCS 14 2167 vs. 2276 88 <0.00001 Random -0.96 -1.27~-0.65 <0.00001
Time to first flatus (d) RCT 7 1570 vs 1555 82 <0.00001 Random -0.3 -0.53~-0.07 0.01
RCS 15 2488 vs. 2842 93 <0.00001 Random -0.74 -0.95~-0.53 <0.00001
Time to ambulation (d) RCT 4 952 vs 947 97 <0.00001 Random -0.43 -1.1~0.24 0.21
RCS 7 1408 vs. 1307 94 <0.00001 Random -0.86 -1.21~-0.52 <0.00001
Overall complications RCT 7 1610 vs 1591 48 0.07 Random 0.78 0.61~1 0.05
RCS 26 3128 vs. 3808 0 0.51 Random 0.82 0.73~0.92 0.0007
Serious complications RCT 6 1506 vs 1493 13 0.33 Fixed 0.93 0.69~1.24 0.62
RCS 11 1867 vs. 2203 7 0.38 Fixed 0.78 0.63~0.97 0.03
Lymph node dissection RCT 8 2144 vs. 2121 0 0.7 Random -0.55 -1.17~0.07 0.08
RCS 21 2556 vs. 2961 66 <0.00001 Random 0.33 -0.70~1.37 0.53
R0 rate RCT 2 558 vs 548 52 0.15 Random 1.01 0.95~1.08 0.68
RCS 7 1677 vs. 1956 0 0.6 Random 1 1.00~1.00 0.99
Recurrence rate RCT 3 740 vs. 736 0 0.95 Random 1.14 0.91~1.44 0.25
RCS 13 2210 vs. 2582 31 0.13 Random 0.92 0.82~1.03 0.14
3-year DFS RCS 4 325 vs. 496 26 0.26 Fixed 1.13 1.04~1.23 0.005
3-year OS RCS 9 1407 vs. 1431 42 0.08 Random 1.11 1.03~1.19 0.004
5-year DFS RCS 13 2312 vs. 2798 0 0.92 Fixed 1.05 1.00~1.11 0.04
5-year OS RCS 17 2753 vs. 3242 0 0.57 Fixed 1.05 1.01~1.10 0.02

RCT: Randomized controlled trial, RCS: Retrospective cohort study, PCS: Prospective cohort studies, RR: Relative risk, WMD: Weighted mean difference, CI: Confidence interval, No.: Number of, OS: Overall survival, severe complications: C-D grade 3 and above, DFS: Disease-free survival, NA: Not applicable. P<0.05 indicates a significant difference