Table 1.
Baseline characteristics of the research population with and without arthritis
| Arthritis (n = 1282) | Non-arthritis (n = 7196) | P value | |
|---|---|---|---|
| Age (years) | 64.52 ± 12.78 | 40.95 ± 17.88 | < 0.001 |
| Gender | |||
| Male | 488 (38.07%) | 3569 (49.60%) | < 0.001 |
| Female | 794 (61.94%) | 3627 (50.41%) | |
| Race (%) | |||
| Mexican American | 57 (4.40%) | 668 (9.27%) | < 0.001 |
| Other race | 94 (7.34%) | 867 (12.05%) | |
| Non-Hispanic white | 1012 (78.96%) | 4882 (67.84%) | |
| Non-Hispanic black | 119 (9.30%) | 779 (10.83%) | |
| Level of education (%) | |||
| Less than high school | 395 (30.80%) | 1163 (16.16%) | < 0.001 |
| High school | 370 (28.83%) | 1493 (20.75%) | |
| More than high school | 517 (40.37%) | 4540 (63.09%) | |
| Smoking behavior (%) | |||
| Current | 733 (57.21%) | 2840 (39.46%) | < 0.001 |
| Past | 290 (22.59%) | 1906 (26.50%) | |
| Never | 259 (20.20%) | 2450 (34.04%) | |
| Alcohol consumption (%) | |||
| Non-drinker | 782 (60.98%) | 4406 (61.23%) | < 0.001 |
| Low to moderate drinker | 407 (31.75%) | 1328 (18.45%) | |
| Heavy drinker | 93 (7.27%) | 1462 (20.32%) | |
| Physical activity (%) | |||
| Low | 198 (15.41%) | 1348 (18.73%) | < 0.001 |
| Moderate | 256 (19.95%) | 1093 (15.20%) | |
| High | 86 (6.74%) | 400 (5.56%) | |
| Not recorded | 742 (57.91%) | 4355 (60.52%) | |
| BMI (kg/m2) | 30.59 ± 7.28 | 27.69 ± 6.55 | < 0.001 |
| WC (cm) | 104.42 ± 15.97 | 94.99 ± 16.54 | < 0.001 |
| HbAIC (%) | 5.93 ± 0.89 | 5.51 ± 0.83 | < 0.001 |
| Albumin (g/dL) | 4.14 ± 0.31 | 4.30 ± 0.33 | < 0.001 |
| Blood urea nitrogen (mg/dL) | 15.61 ± 7.05 | 12.39 ± 4.84 | < 0.001 |
| Total calcium (mg/dL) | 9.40 ± 0.42 | 9.45 ± 0.37 | 0.003 |
| Creatinine (mg/dL) | 0.94 ± 0.42 | 0.85 ± 0.27 | < 0.001 |
| P (mg/dL) | 3.77 ± 0.58 | 3.85 ± 0.62 | 0.002 |
| TG (mg/dL) | 185.75 ± 185.77 | 150.17 ± 124.48 | < 0.001 |
| Uric acid (mg/dL) | 5.73 ± 1.50 | 5.40 ± 1.37 | < 0.001 |
| FT3 (pmol/L) | 4.65 ± 0.64 | 5.012 ± 0.84 | < 0.001 |
| FT4 (pmol/L) | 10.62 ± 2.60 | 10.11 ± 2.02 | < 0.001 |
| TSH (mIU/L) | 2.16 ± 2.59 | 2.06 ± 3.86 | 0.513 |
| Tg (ng/mL) | 19.60 ± 96.95 | 15.16 ± 31.60 | 0.007 |
| TgAb (IU/mL) | 16.11 ± 111.26 | 10.99 ± 97.56 | 0.202 |
| TPOAb (IU/mL) | 15.40 ± 77.07 | 20.01 ± 86.34 | 0.188 |
| FT3/FT4 | 0.46 ± 0.11 | 0.51 ± 0.14 | < 0.001 |
| TSHI | 1.90 ± 0.78 | 1.79 ± 0.71 | < 0.001 |
| TT4RI | 21.73 ± 19.28 | 19.51 ± 19.14 | 0.004 |
| TFQI | 0.07 ± 0.35 | − 0.01 ± 0.32 | < 0.001 |
| Type of arthritis (%) | |||
| Osteoarthritis | 630 (49.14%) | – | < 0.001 |
| Rheumatoid arthritis | 383 (29.88%) | – | |
| Psoriatic arthritis | 8 (0.62%) | – | |
| Other | 261 (20.36%) | – | |
Mean ± SD for continuous variables: the P value was calculated by the weighted linear regression model. (%) for categorical variables: the P value was calculated by the weighted chi-square test
BMI body mass index, WC waist circumference, P phosphorus, TG triglycerides