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Table 2 Outcomes among patients with each characteristic before propensity score matching

From: Laparoscopic gastrectomy with and without prophylactic drains in gastric cancer: a propensity score-matched analysis

  Postoperative complication ≥grade II* Postoperative complication ≥grade III* Initiation of soft diet (days) Postoperative hospital stay (days)
Drain No drain Drain No drain Drain No drain Drain No drain
n (%) n (%) n (%) n (%) Median (range) Median (range) Median (range) Median (range)
Depth of invasion
 cT1 (n = 125 vs 180) 33 (26.4) 22 (12.2) 9 (7.2) 2 (1.1) 5 (3–47) 4 (3–33) 13 (7–82) 11 (3–65)
 cT2 (n = 60 vs 53) 15 (25.0) 7 (13.2) 7 (11.7) 1 (1.9) 5 (3–44) 4 (3–45) 11.5 (8–104) 12 (7–57)
 cT3 (n = 62 vs 33) 12 (19.4) 4 (12.1) 3 (4.8) 0 (0) 5 (3–29) 5 (3–18) 13 (8–92) 13 (6–56)
 cT4 (n = 80 vs 35) 18 (22.5) 5 (14.3) 3 (3.8) 1 (2.9) 5 (3–81) 4 (3–67) 14 (9–114) 11 (4–90)
Node metastasis
 cN0 (n = 230 vs 253) 59 (25.7) 32 (12.6) 16 (7.0) 3 (1.2) 5 (3–54) 4 (3–45) 13 (7–82) 12 (3–65)
 cN1 (n = 48 vs 24) 12 (25.0) 3 (12.5) 5 (10.4) 0 (0) 5 (3–30) 4 (3–8) 13 (10–104) 11.5 (6–30)
 cN2 (n = 39 vs 20) 6 (15.4) 2 (10.0) 0 (0) 1 (5.0) 5 (3–31) 5 (3–67) 12 (9–60) 11.5 (4–90)
 cN3 (n = 10 vs 4) 1 (10.0) 1 (25.0) 1 (10.0) 0 (0) 4.5 (3–81) 3.5 (3–5) 13.5 (10–114) 11.5 (10–27)
Operative procedure
 Distal gastrectomy (DG) (n = 173 vs 256) 34 (19.7) 33 (12.9) 8 (4.6) 4 (1.6) 4 (3–54) 4 (3–67) 12 (7–59) 11 (4–90)
 Total gastrectomy (TG) (n = 134 vs 40) 36 (26.9) 5 (12.5) 12 (9.0) 0 (0) 5 (3–81) 5 (3–18) 12 (8–114) 12 (4–56)
 Remnant gastrectomy (n = 20 vs 5) 8 (40.0) 0 (0) 2 (10.0) 0 (0) 6.5 (4–22) 5 (3–5) 16.5 (9–82) 11 (3–12)
Extent of lymphadenectomy
 DG D1+ or less (n = 86 vs 167) 19 (22.1) 24 (14.4) 5 (5.8) 4 (2.4) 5 (3–21) 4 (3–67) 12 (9–52) 11 (4–90)
 DG D2 (n = 87 vs 89) 15 (17.2) 9 (10.1) 3 (3.4) 0 (0) 4 (3–54) 4 (3–12) 11 (7–59) 12 (6–34)
 TG D1+ or less (n = 115 vs 43) 31 (27.0) 4 (9.3) 11 (9.6) 0 (0) 5 (3–44) 5 (3–18) 13 (8–92) 12 (3–56)
 TG D2 (n = 39 vs 2) 13 (33.3) 1 (50.0) 3 (7.7) 0 (0) 6 (3–81) 6 (5–7) 14 (9–114) 14 (14–14)
R status
 R0 (n = 286 vs 285) 67 (23.4) 36 (12.6) 18 (6.3) 3 (1.1) 5 (3–47) 4 (3–45) 13 (7–92) 12 (3–65)
 R1 (n = 24 vs 7) 5 (20.8) 0 (0) 2 (8.3) 0 (0) 5.5 (3–54) 4 (3–6) 13.5 (9–104) 13 (10–34)
 R2 (n = 17 vs 9) 6 (35.3) 2 (22.2) 2 (11.8) 1 (11.1) 6 (4–81) 4 (3–67) 16 (10–114) 11 (4–90)
Blood loss
 < 500 ml (n = 322 vs 300) 77 (23.9) 38 (12.7) 22 (6.8) 4 (1.3) 5 (3–81) 4 (3–67) 13 (7–114) 11.5 (3–90)
 ≥ 500 ml (n = 5 vs 1) 1 (20.0) 0 (0) 0 (0) 0 (0) 6 (4–21) 7 13 (11–31) 13
  1. *Clavien–Dindo classification