Table 1 Frequency distributions of demographics in studied subjects
Variables | NSCLC case-control study | PN case-control study | ||||
|---|---|---|---|---|---|---|
Case, n (%) | Control, n (%) | Pa | Malignant, n (%) | Benign, n (%) | Pa | |
No. of subjects | 210 | 245 | 131 | 61 | ||
Gender | ||||||
Male | 156(74.3) | 173(70.6) | 0.383 | 65(49.6) | 36(59.0) | 0.225 |
Female | 54(25.7) | 72(29.4) | 66(50.4) | 25(41.0) | ||
Age (years) | ||||||
>60 | 109(51.9) | 121(49.4) | 0.592 | 70(53.4) | 16(26.2) | < 0.001 |
≤60 | 101(48.1) | 124(50.6) | 61(46.6) | 45(73.8) | ||
Smoking status | ||||||
Ever | 105(50.0) | 88(35.9) | 0.002 | 37(28.2) | 15(24.6) | 0.596 |
Never | 105(50.0) | 157(64.1) | 94(71.8) | 46(75.4) | ||
Stages | ||||||
LS | 32(15.3) | |||||
RDS | 158(75.2) | |||||
Undetermined | 20(9.5) | |||||
Histological type | ||||||
LUSC | 97(46.2) | 6(4.6) | ||||
LUAD | 81(38.6) | 113(86.3) | ||||
Other/unknown | 32(15.2) | 12(9.1) | ||||
Maximum diameter | ||||||
< 10 mm | 45(34.4) | 48(78.7) | < 0.001 | |||
10–20 mm | 57(43.5) | 12(19.7) | ||||
> 20–30 mm | 29(22.1) | 1(1.6) | ||||