Drainage group | No-drainage group | |||
---|---|---|---|---|
( n = 45) | ( n = 33) | p value | ||
Male:female | 28:17 | 23:10 | 0.493a | |
Age (years) | 70.5 ± 13.4 | 74.8 ± 9.8 | 0.125b | |
BMI (kg/m2) | 23.2 ± 4.0 | 23.2 ± 4.0 | 23.2 ± 4.0 | |
Concurrent illness | ||||
None | 7(15.6%) | 7(21.2%) | 0.520a | |
Arrhythmia | 2(3.6%) | 5(15.2%) | ||
Ischemic heart disease | 7(12.7%) | 2(6.1%) | ||
Hypertension | 22(40.0%) | 12(36.4%) | ||
Diabetes mellitus | 6(10.1%) | 5(15.2%) | ||
Cerebral infarction | 4(7.3%) | 4(12.1%) | ||
COPD | 9(16.4%) | 6(18.2%) | ||
Hyperlipidemia | 9(16.4%) | 3(9.1%) | ||
Other | 7(12.7%) | 5(15.2%) | ||
Location of tumor (M/L) | 26/19 | 14/19 | 0.180a | |
Diameter of tumor (mm) | 44.5 ± 31.6 | 39.0 ± 19.3 | 0.382b | |
Depth of tumor invasion | 1a | 11(24.4%) | 5(15.2%) | 0.177a |
1b | 13(28.9%) | 12(36.4%) | ||
2 | 6(13.3%) | 8(24.2%) | ||
3 | 10(22.2%) | 2(6.1%) | ||
4a | 5(11.1%) | 6(18.2%) | ||
Lymph node metastasis | 0 | 33(73.3%) | 23(69.7%) | 0.132a |
1 | 2(4.4%) | 6(18.2%) | ||
2 | 5(11.1%) | 1(3.0%) | ||
3a | 5(11.1%) | 2(6.1%) | ||
3b | 0(0%) | 1(3.0%) | ||
Tumor stage | 1a | 24(53.3%) | 14(42.4%) | 0.245a |
1b | 4(8.9%) | 9(27.3%) | ||
2a | 5(11.1%) | 1(3.0%) | ||
2b | 2(4.4%) | 4(12.1%) | ||
3a | 4(8.9%) | 2(6.1%) | ||
3b | 4(8.9%) | 2(6.1%) | ||
3c | 2(4.4%) | 1(3.0%) |