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Table 2 The characteristics of included patients

From: Risk factors of deep vein thrombosis of lower extremity in patients undergone gynecological laparoscopic surgery: what should we care

Variables DVT group (n = 41) Non-DVT group (n = 314) χ2 p
Age (years)
 < 50 7 (17.07%) 227 (72.29%) 1.209 0.031
 ≥ 50 34 (82.93%) 87 (27.71%)   
BMI (kg/m2)
 < 25 26 (63.41%) 186 (59.24%) 1.144 0.101
 ≥ 25 15 (36.59%) 128 (40.76%)   
Diabetes
 Yes 12 (29.27%) 73 (23.25%) 1.118 0.062
 No 29 (70.73%) 241 (76.75%)   
Hypertension
 Yes 22 (53.65%) 62 (19.75%) 1.133 0.019
 No 19 (46.35%) 252 (80.25%)   
Hyperlipidemia
 Yes 10 (24.39%) 62 (19.76%) 1.181 0.112
 No 31 (75.61%) 246 (78.34%)   
D-dimer (mg/L)
 < 0.5 5 (12.20%) 211 (67.20%) 1.226 0.036
 ≥ 0.5 36 (87.80%) 103 (32.80%)   
ASA classification
 Level I 20 (48.78%) 156 (49.68%) 1.140 0.074
 Level II 21 (51.22%) 158 (50.32%)   
Duration of surgery (min)
  < 60 11 (26.83%) 181 (57.64%) 1.183 0.019
  ≥ 60 30 (73.17%) 133 (42.26%)   
Intraoperative blood transfusion
 Yes 10 (24.39%) 35 (11.15%) 1.128 0.054
 No 31 (75.61%) 279 (88.85%)   
Intraoperative pneumoperitoneum pressure (mmHg)
 < 15 16 (39.02%) 202 (64.33%) 1.102 0.006
 ≥ 15 25 (60.98%) 112 (35.67%)   
Duration of days in bed
 < 3 12 (29.27%) 226 (71.97%) 1.177 0.031
 ≥ 3 29 (70.73%) 88 (28.03%)