Table 2 Patient characteristics before and after propensity score matching
Before PSM (N = 1975) | After PSM (N = 784) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Characterics | All | Family history (+) | Family history (−) | P | All | Family history (+) | Family history (−) | P | ||
Age, years | 56.56 ± 9.01 | 56.1 ± 9.39 | 58.39 ± 7.05 | <0.0001a | 58.61 ± 7.15 | 58.57 ± 6.855 | 58.66 ± 7.556 | 0.865a | ||
Sex (%) | <0.0001b | 0.94b | ||||||||
Male | 1083 | 54.90% | 136 (34.1%) | 947 (60.05%) | 517 | 65.90% | 258 (65.8%) | 259 (66.1%) | ||
Female | 892 | 45.10% | 262 (65.9%) | 630 (39.95%) | 267 | 34.10% | 134 (34.2%) | 133 (33.9%) | ||
BMI | 24.32 ± 3.49 | 23.76 ± 3.36 | 24.46 ± 3.50 | <0.0001a | 23.76 ± 3.36 | 23.88 ± 3.56 | 0.644a | |||
Nodule number | 0.63 ± 1.16 | 1.09 ± 1.53 | 0.51 ± 1.027 | <0.0001a | 0.84 ± 1.392 | 1.1 ± 1.53 | 0.59 ± 1.17 | <0.0001a | ||
History of other cancers | 0.023b | 0.601b | ||||||||
Present | 621 | 31.40% | 144 (36.1%) | 477 (30.2%) | 275 | 35.10% | 141 (36%) | 131(34.2%) | ||
Absent | 1354 | 68.50% | 254 (63.9%) | 1100 (69.8%) | 509 | 64.90% | 258 (64%) | 251(65.8%) | ||
Category 4 lesion | <0.0001b | 0.186b | ||||||||
Present | 53 | 2.68% | 21 (5.27%) | 32 (2.02%) | 36 | 4.59% | 21 (5.3%) | 15 (3.82%) | ||
Absent | 1922 | 97.32% | 377 (94.73%) | 1545 (97.98%) | 748 | 95.41% | 371 (94.7%) | 377 (96.18%) | ||
Lung cancer | <0.0001b | 0.019c | ||||||||
Present | 27 | 1.40% | 15 (3.76%) | 12 (0.76%) | 20 | 2.60% | 15 (3.8%) | 5 (1.3%) | ||
Absent | 1948 | 98.60% | 383 (96.24%) | 1565 (99.24%) | 764 | 97.40% | 377 (96.2) | 387 (98.7) | ||