Table 2 Baseline characteristics of enrolled patients after propensity score matching
Variables | Overall (n = 236) | Non-treatment (n = 118) | Treatment (n = 118) | p value |
|---|---|---|---|---|
Male, n (%) | 75(31.8) | 34(28.8) | 41(34.7) | 0.402 |
Age group, n (%) | 0.955 | |||
≤ 50 years | 44(18.6) | 23(19.5) | 21(17.8) | |
>50 and ≤ 60 years | 84(35.6) | 40(33.9) | 44(37.3) | |
>60 and ≤ 70 years | 92(39.0) | 47(39.8) | 45(38.1) | |
>70 years | 16(6.8) | 8(6.8) | 8(6.8) | |
Smoke index group, n (%) | 0.749 | |||
No smoking | 187(79.2) | 94(79.7) | 93(78.8) | |
Smoking index ≤ 500 | 28(11.9) | 15(12.7) | 13(11.0) | |
Smoking index>500 | 21(8.9) | 9(7.6) | 12(10.2) | |
ACE-27 Score, n (%) | 0.983 | |||
0 | 103(43.6) | 53(44.9) | 50(42.4) | |
1 | 65(27.5) | 32(27.1) | 33(28.0) | |
2 | 66(28.0) | 32(27.1) | 34(28.8) | |
3 | 2(0.8) | 1(0.8) | 1(0.8) | |
Diameter group, n (%) | 0.915 | |||
≤ 1 cm | 17(7.2) | 8(6.8) | 9(7.6) | |
>1 and ≤ 2 cm | 104(44.1) | 50(42.4) | 54(45.8) | |
>2 and ≤ 3 cm | 80(33.9) | 41(34.7) | 39(33.1) | |
>3 and ≤ 4 cm | 35(14.8) | 19(16.1) | 16(13.6) | |
Multiple risk factors, n (%) | 121(51.3) | 57(48.3) | 64(54.2) | 0.435 |
TNM Stage, n (%) | 1.000 | |||
IA | 62(26.3) | 31(73.7) | 31(73.7) | |
IB | 174(73.7) | 87(73.7) | 87(73.7) |