Table 1 Baseline characteristics of participants
From: Association between serum vitamin C and HPV infection in American women: a cross-sectional study
Total Participants | HPV infection | No HPV infection | |||||
|---|---|---|---|---|---|---|---|
Variables | (n = 2174) | (n = 1011) | (n = 1163) | p-value | |||
No. (%) | SE | No. (%) | SE | No. (%) | SE | ||
Age, mean, y | 39.9 | 0.3 | 38.7 | 0.4 | 40.9 | 0.4 | 0.002 |
Race/Ethnicity | 0.011 | ||||||
Mexican American | 423 (7.5) | 1.1 | 183 (7.5) | 1.3 | 240 (7.4) | 1 | |
Other Hispanic | 70 ( 3.6) | 0.6 | 36 (4.0) | 0.7 | 34 (3.3) | 0.8 | |
Non-Hispanic White | 1100 (72.2) | 2.4 | 456 (67.4) | 2.7 | 644 (75.8) | 2.5 | |
Non-Hispanic Black | 492 (11.9) | 1.5 | 301 (16.7) | 2 | 191 (8.2) | 1.2 | |
Other Race | 89 ( 4.8) | 0.7 | 35 ( 4.3) | 0.8 | 54 (5.3) | 1 | |
PIR, mean | 3.1 | 0.1 | 2.8 | 0.1 | 3.4 | 0.1 | < 0.001 |
Folate, mean, nmol/L | 30.8 | 0.8 | 28.6 | 0.7 | 32.6 | 1.2 | < 0.001 |
Albumin, mean, g/L | 41.5 | 0.1 | 41.2 | 0.1 | 41.7 | 0.1 | 0.004 |
Vitamin C, mean,umol/L | 55.8 | 1.2 | 52.8 | 1.5 | 58 | 1.3 | 0.002 |
Vitamin E, mean, umol/L | 28.7 | 0.4 | 28.3 | 0.5 | 29 | 0.4 | 0.003 |
A.Carotene, mean, umol/L | 0.1 | 0 | 0.1 | 0 | 0.1 | 0 | < 0.001 |
Vitamin A, mean, umol/L | 1.9 | 0 | 1.9 | 0 | 1.9 | 0 | 0.916 |
Vitamin D, mean, nmol/L | 62.8 | 1.2 | 61 | 1.3 | 64.2 | 1.3 | 0.012 |
BMI, mean, kg/m2 | 28.4 | 0.2 | 28.5 | 0.3 | 28.3 | 0.3 | 0.616 |
Alcohol | 0.003 | ||||||
Yes | 1398 (70.5) | 1.6 | 678 (74.8) | 1.7 | 720 (67.3) | 2.1 | |
No | 776 (29.5) | 1.6 | 333 (25.2) | 1.7 | 443 (32.7) | 2.1 | |
Health insurance | 0.013 | ||||||
Yes | 1698 (82.2) | 1.5 | 762 (79.2) | 1.9 | 936 (84.5) | 1.7 | |
No | 476 (17.8) | 1.5 | 249 (20.8) | 1.9 | 227 (15.5) | 1.7 | |
First age, mean, y | 17.6 | 0.1 | 17.2 | 0.1 | 18 | 0.1 | < 0.001 |
Partner number, mean | 10.2 | 1.7 | 10.8 | 0.6 | 9.7 | 2.9 | < 0.001 |
Smoking status | 0.001 | ||||||
Yes | 877 (43.9) | 1.1 | 456 (50.0) | 2.2 | 421 (39.3) | 1.5 | |
No | 1297 (56.1) | 1.1 | 555 (50.0) | 2.2 | 742 (60.7) | 1.5 | |
Education | < 0.001 | ||||||
High school graduate or less | 892 (34.4) | 1.4 | 463 (39.1) | 1.9 | 429 (30.7) | 1.7 | |
Some College | 766 (37.0) | 1.2 | 357 (36.3) | 1.5 | 409 (37.6) | 1.8 | |
College Graduate or above | 516 (28.6) | 1.9 | 191 (24.6) | 2.1 | 325 (31.7) | 2.3 | |
Marital status | < 0.001 | ||||||
Married or living with partner | 1404 (67.5) | 1.4 | 545 (56.4) | 1.9 | 859 (75.9) | 1.6 | |
Widowed, divorced, or separated | 373 (17.1) | 1.2 | 222 (22.6) | 1.9 | 151 (13) | 1.4 | |
Never married | 397 (15.4) | 1.2 | 244 (21.0) | 1.6 | 153 (11.1) | 1.3 | |
Health condition | 0.054 | ||||||
Good | 1789 (86.0) | 0.9 | 813 (84.2) | 1.4 | 976 (87.4) | 1 | |
Poor | 385 (14.0) | 0.9 | 198 (15.8) | 1.4 | 187 (12.6) | 1 | |
Vitamin C (umol/L) | 0.003 | ||||||
^23.99 | 271 (14.8) | 1.4 | 151 (18.4) | 1.8 | 120 (12.0) | 1.5 | |
≤24–49.99 | 576 (25.0) | 1.3 | 279 (25.0) | 1.7 | 297 (25.0) | 1.4 | |
50–69.99 | 749 (32.6) | 1.8 | 330 (31.7) | 1.8 | 419 (33.3) | 2.2 | |
≥70 | 578 (27.6) | 1.7 | 251 (24.9) | 2 | 327 (29.7) | 2.1 | |