Prognostic Factors Analysis and Nomogram Construction of Dual Primary Lung Cancer: A Population Study

Table 2

The clinicopathological characteristics of FPLC and SPLC in all patients.

Variables	FPLC	SPLC
	No. of patients (%)	No. of patients (%)
Age
<65	2033 (37.57%)	1370 (25.32%)
≥65	3378 (62.43%)	4041 (74.68%)
Gender
Female	2894 (53.48%)	2894 (53.48%)
Male	2517 (46.52%)	2517 (46.52%)
Race
White	4613 (85.25%)	4613 (85.25%)
Black	528 (9.76%)	528 (9.76%)
Others	270 (4.99%)	270 (4.99%)
Histologic type
Adenocarcinoma	1987 (36.72%)	1973 (36.46%)
Squamous cell carcinoma	1386 (25.61%)	1172 (21.66%)
Small cell carcinoma	286 (5.29%)	411 (7.60%)
Bronchioloalveolar cancer	307 (5.67%)	214 (3.95%)
Others	1445 (26.70%)	1641 (30.33%)
Primary site
Left lower lobe	746 (13.79%)	871 (16.10%)
Left upper lobe	1577 (29.14%)	1340 (24.76%)
Right upper lobe	1725 (31.88%)	1479 (27.33%)
Right middle lobe	263 (4.86%)	294 (5.43%)
Right lower lobe	832 (15.38%)	956 (17.67%)
Left main bronchus	38 (0.70%)	82 (1.52%)
Left Lung, Nos	45 (0.83%)	103 (1.90%)
Left overlapping lesion of lung	16 (0.30%)	11 (0.20%)
Right main bronchus	47 (0.87%)	95 (1.76%)
Right Lung, Nos	87 (1.61%)	159 (2.94%)
Right overlapping lesion of lung	35 (0.65%)	21 (0.39%)
Grade
I	603 (11.14%)	591 (10.92%)
II	1869 (34.54%)	1290 (23.84%)
III	1689 (31.21%)	1169 (21.60%)
IV	167 (3.09%)	126 (2.33%)
No/unknown	1083 (20.01%)	2235 (41.30%)
AJCC stage
IA	1975 (36.50%)	2324 (42.95%)
IB	1362 (25.17%)	642 (11.86%)
IIA	128 (2.37%)	127 (2.35%)
IIB	331 (6.12%)	154 (2.85%)
IIIA	561 (10.37%)	427 (7.89%)
IIIB	595 (11.00%)	689 (12.73%)
IV	459 (8.48%)	1048 (19.37%)
AJCC N
N0	3957 (73.13%)	3840 (70.97%)
N1	458 (8.46%)	353 (6.52%)
N2	817 (15.10%)	888 (16.41%)
N3	145 (2.68%)	247 (4.56%)
Nx	34 (0.63%)	83 (1.53%)
Surgery
Yes	1415 (26.15%)	3308 (61.13%)
No	3996 (73.85%)	2103 (38.87%)
Radiation
Yes	1447 (26.74%)	2135 (39.54%)
No/unknown	3925 (73.26%)	3276 (60.46%)
Chemotherapy
Yes	1889 (34.91%)	1655 (30.59%)
No/unknown	3522 (65.09%)	3756 (69.41%)