Table 1. Basic demographics and compare the treatment and non-treated lung cancer patients.
| Variables | Treatment | Non-treated | P value | ||
| N | % | N | % | ||
| Total patients | 29807 | 77.25 | 8777 | 22.75 | |
| Patient age at cancer diagnosis | <0.001 | ||||
| ≤44 | 1611 | 89.05 | 198 | 10.95 | |
| 45–54 | 4150 | 89.36 | 494 | 10.64 | |
| 55–64 | 6182 | 87.25 | 903 | 12.75 | |
| 65–74 | 9111 | 79.87 | 2296 | 20.13 | |
| ≥75 | 8679 | 64.12 | 4856 | 35.88 | |
| Average age of cancer diagnosis (M±SD) | 66.16 | 12.40 | 73.59 | 11.50 | <0.001 |
| Gender | <0.001 | ||||
| Male | 19253 | 76.26 | 5993 | 23.74 | |
| Female | 10554 | 79.13 | 2784 | 20.87 | |
| Urbanization level of residence area | <0.001 | ||||
| Level 1 | 8130 | 78.85 | 2181 | 21.15 | |
| Level 2 | 8517 | 78.84 | 2286 | 21.16 | |
| Level 3 | 4495 | 76.54 | 1378 | 23.46 | |
| Level 4 | 4672 | 75.93 | 1481 | 24.07 | |
| Level 5 | 1059 | 73.44 | 383 | 26.56 | |
| Level 6 | 1500 | 73.03 | 554 | 26.97 | |
| Level 7 | 1360 | 73.75 | 484 | 26.25 | |
| Insured monthly salary (US dollars) | <0.001 | ||||
| Dependent population | 8910 | 76.56 | 2728 | 23.44 | |
| ≤576 | 6683 | 72.35 | 2554 | 27.65 | |
| 577–760 | 10032 | 77.13 | 2975 | 22.87 | |
| ≥761 | 4105 | 89.39 | 487 | 10.61 | |
| Insurance category | <0.001 | ||||
| Employees/employers | 8176 | 88.47 | 1066 | 11.53 | |
| Farmers or fishers | 7925 | 74.56 | 2704 | 25.44 | |
| Low-income household | 334 | 71.06 | 136 | 28.94 | |
| Unemployed, retired, others | 13372 | 73.30 | 4871 | 26.70 | |
| Pre-cancer CCI | <0.001 | ||||
| ≤3 | 15615 | 80.57 | 3765 | 19.43 | |
| 4–6 | 5619 | 76.84 | 1694 | 23.16 | |
| 7–9 | 5899 | 74.64 | 2004 | 25.36 | |
| ≥10 | 2674 | 67.05 | 1314 | 32.95 | |
| Other catastrophic illnesses | <0.001 | ||||
| No | 28838 | 77.75 | 8252 | 22.25 | |
| Yes | 969 | 64.86 | 525 | 35.14 | |
| Lung cancer stage | <0.001 | ||||
| I | 3636 | 90.90 | 364 | 9.10 | |
| II | 911 | 86.60 | 141 | 13.40 | |
| III | 7770 | 80.94 | 1830 | 19.06 | |
| IV | 16210 | 75.52 | 5254 | 24.48 | |
| Accreditation level of hospital# | <0.001 | ||||
| Medical centers | 21168 | 80.66 | 5075 | 19.34 | |
| Regional hospitals | 7861 | 73.25 | 2871 | 26.75 | |
| Local hospitals | 506 | 46.81 | 575 | 53.19 | |
| Others | 119 | 57.21 | 89 | 42.79 | |
| Hospital ownership# | 0.1051 | ||||
| Public hospitals | 11025 | 77.95 | 3118 | 22.05 | |
| Private hospitals | 18629 | 77.23 | 5492 | 22.77 | |
Note: CCI, Charlson Comorbidity Index. #The hospital was the diagnosing hospital for non-treatment patients and was the major treatment hospital for treated group.