Table 1 Baseline characteristics of NHANES participants during 2007–2018 (before weighted)
From: Is folic acid associated with lung cancer development? A cross-sectional study in NHANES
Variables | Total, N (%) | Non-LC, N (%) | LC, N (%) | P value |
|---|---|---|---|---|
Total | 27,631 | 27,564 (99.8) | 67 (0.2) | Â |
Age (years) |  |  |  | < 0.001 |
 <60 | 18,492 (66.9) | 18,477 (67.0) | 15 (22.4) |  |
 ≥60 | 9139 (33.1) | 9087 (33.0) | 52 (77.6) |  |
Sex | Â | Â | Â | 0.186 |
 Male | 13,441 (48.6) | 13,403 (48.6) | 38 (56.7) |  |
 Female | 14,190 (51.4) | 14,161 (51.4) | 29 (43.3) |  |
Race | Â | Â | Â | 0.002 |
 Non-Hispanic white | 11,908 (43.1) | 11,866 (43.0) | 42 (62.7) |  |
 Non-Hispanic black | 5853 (21.2) | 5840 (21.2) | 13 (19.4) |  |
 Other | 9870 (35.7) | 9958 (35.8) | 12 (17.9) |  |
Marital status |  |  |  | < 0.001 |
 Married | 14,163 (51.3) | 11,433 (51.3) | 30 (44.8) |  |
 Unmarried | 7325 (26.5) | 7318 (26.5) | 7 (10.4) |  |
 Other | 6143 (22.2) | 6113 (22.2) | 30 (44.8) |  |
Education | Â | Â | Â | 0.677 |
 Less than high school | 6418 (23.2) | 6401 (23.2) | 17 (25.4) |  |
 High school or above | 21,213 (76.8) | 21,163 (76.8) | 50 (74.6) |  |
BMI (kg/m2) | Â | Â | Â | 0.031 |
 <25 | 7850 (28.4) | 7823 (28.4) | 27 (40.3) |  |
 ≥25 | 19,781 (71.6) | 19,741 (71.6) | 40 (59.7) |  |
Hypertension |  |  |  | < 0.001 |
 Yes | 10,023 (36.3) | 9984 (36.2) | 39 (58.2) |  |
 No | 17,607 (63.7) | 17,580 (63.8) | 28 (41.8) |  |
Diabetes |  |  |  | < 0.001 |
 Yes | 3602 (13.0) | 3584 (13.0) | 18 (26.9) |  |
 No | 23,384 (84.7) | 23,339 (84.7) | 45 (67.2) |  |
 Borderline | 645 (2.3) | 641 (2.3) | 4 (6.0) |  |
Smoking status |  |  |  | < 0.001 |
 ≥100 Sticks/lifetime | 12,358 (44.7) | 12,298 (44.6) | 60 (89.6) |  |
 < 100Sticks/lifetime | 15,273 (55.3) | 15,266 (55.4) | 7 (10.4) |  |
Alcohol drinks | Â | Â | Â | 0.003 |
 < 14 drinks/past 12 Mos | 17,676 (64.0) | 17,646 (64.0) | 30 (44.8) |  |
 ≥ 15 drinks/past 12 Mos | 145 (0.5) | 145 (0.5) | 0 (0.0) |  |
 Other/unknown | 9810 (35.5) | 9773 (35.5) | 37 (55.2) |  |
PIR | Â | Â | Â | 0.057 |
 <1 | 5943 (21.5) | 5929 (21.5) | 14 (20.9) |  |
 1-<4 | 14,699 (53.2) | 14,655 (53.2) | 44 (65.7) |  |
 ≥4 | 6989 (25.3) | 6980 (25.3) | 9 (13.4) |  |