Table 1 Clinical covariates in the training and testing sets
From: A practical prognostic lncRNA signature for lung squamous cell carcinoma
Covariates | Group | Total | Training set | Testing set | P-value | Method |
|---|---|---|---|---|---|---|
n = 388 | n = 194 | n = 194 | ||||
Survival time |  | 2.95±2.74* | 3.00±2.75 | 2.9±2.73 | 0.719 | t-test |
Vital status | Alive | 221(56.96%) | 116(59.79%) | 105(54.12%) | 0.305 | χ 2 test |
Dead | 167(43.04%) | 78(40.21%) | 89(45.88%) | |||
Stage | I | 183(47.16%) | 84(43.3%) | 99(51.03%) | 0.200 | Fisher's exact test |
II | 130(33.51%) | 67(34.54%) | 63(32.47%) | |||
III | 69(17.78%) | 38(19.59%) | 31(15.98%) | |||
IV | 6(1.55%) | 5(2.58%) | 1(0.52%) | |||
T stage | T1 | 85(21.91%) | 45(23.2%) | 40(20.62%) | 0.777 | χ 2 test |
T2 | 232(59.79%) | 112(57.73%) | 120(61.86%) | |||
T3 | 54(13.92%) | 27(13.92%) | 27(13.92%) | |||
T4 | 17(4.38%) | 10(5.15%) | 7(3.61%) | |||
N stage | N0 | 243(62.63%) | 114(58.76%) | 129(66.49%) | 0.367 | Fisher's exact test |
N1 | 107(27.58%) | 57(29.38%) | 50(25.77%) | |||
N2 | 33(8.51%) | 20(10.31%) | 13(6.7%) | |||
N3 | 5(1.29%) | 3(1.55%) | 2(1.03%) | |||
M stage | M0 | 382(98.45%) | 189(97.42%) | 193(99.48%) | 0.215 | Fisher's exact test |
M1 | 6(1.55%) | 5(2.58%) | 1(0.52%) | |||
Age | <=65 | 138(35.57%) | 68(35.05%) | 70(36.08%) | 0.916 | χ 2 test |
>65 | 250(64.43%) | 126(64.95%) | 124(63.92%) | |||
Gender | Female | 99(25.52%) | 45(23.2%) | 54(27.84%) | 0.352 | χ 2 test |
Male | 289(74.48%) | 149(76.8%) | 140(72.16%) | |||
Smoke* | Non-smoker | 212(54.64%) | 105(54.12%) | 107(55.15%) | 0.919 | χ 2 test |
Smoker | 176(45.36%) | 89(45.88%) | 87(44.85%) |