Table 1.
Basic clinical characteristics of initial sample group.
| Basic information | Early recurrence and metastasis group | No recurrence and metastasis group | p value |
|---|---|---|---|
| n = 40 | n = 40 | ||
| Age (year) | 0.946a | ||
| Mean ± SD | 60.2 ± 11.0 | 60.0 ± 8.5 | |
| Gender | 0.171b | ||
| Male | 19(47.5%) | 13(32.5%) | |
| Female | 21(52.5%) | 27(67.5%) | |
| Smoking history | 0.112b | ||
| Yes | 20(50.0%) | 13(32.5%) | |
| No | 20(50.0%) | 27(67.5%) | |
| Surgical method | 0.356c | ||
| Lobes of lung | 36(90.0%) | 39(97.5%) | |
| Wedge | 4(10.0%) | 1(2.5%) | |
| Tumor location | 0.700d | ||
| Right upper | 11(27.5%) | 16(40.0%) | |
| Right middle | 3(7.5%) | 3(7.5%) | |
| Right bottom | 13(32.5%) | 8(20.0%) | |
| Left upper | 9(22.5%) | 9(22.5%) | |
| Left bottom | 4(10.0%) | 4(10.0%) | |
| Degree of differentiation | 0.267e | ||
| Low + Moderately and low | 10(25.0%) | 6(15.0%) | |
| Moderately + Moderately high + High | 30(75.0%) | 34(85.0%) | |
| Pleural involvement | 1.000b | ||
| Yes | 31(77.5%) | 31(77.5%) | |
| No | 9(22.5%) | 9(22.5%) | |
| Postoperative chemotherapy | 0.736b | ||
| Yes | 18(46.2%) | 19(50.0%) | |
| No | 21(53.8%) | 19(50.9%) | |
| Pathologic subtype | 0.044d | ||
| Mural predominance | 3(5.1%) | 6(15.0%) | |
| Papillary predominant type | 4(10.0%) | 10(25.0%) | |
| Acinar predominant type | 24(60.0%) | 11(27.5%) | |
| Solid predominant type | 5(12.5%) | 5(12.5%) | |
| Micropapillary predominance | 0(0.0%) | 0(0.0%) | |
| Other | 4(10.0%) | 8(20.0%) |
Note: a: unpaired T-test; b: Pearson x2 test; c: continuity corrected Chi-square test; d: Fisher exact test; e: Wilcoxon rank sum test (Mann-Whitney U test), SD (standerd deviation).