Table 6.
Descriptive statistics for sub-sample characteristics by TPOAb groups.
| TPO >35 | TPO ⩽35 | ||||||
|---|---|---|---|---|---|---|---|
| Categorical variables | n | Weighted % | SE of weighted % | Categorical variables | n | Weighted % | SE of weighted % |
| RKOA | RKOA | ||||||
| Yes | 59 | 35.4 | 5.9 | Yes | 927 | 38.0 | 1.4 |
| No | 84 | 64.6 | 5.9 | No | 1221 | 62.0 | 1.4 |
| sRKOA | sRKOA | ||||||
| Yes | 20 | 11.9 | 3.2 | Yes | 351 | 13.3 | 0.9 |
| No | 123 | 88.1 | 3.2 | No | 1797 | 86.7 | 0.9 |
| Chondrocalcinosis | Chondrocalcinosis | ||||||
| Yes | 9 | 7.6 | 2.8 | Yes | 192 | 7.3 | 0.7 |
| No | 134 | 92.4 | 2.8 | Nosysymsym | 1956 | 92.7 | 0.7 |
| Age | Age | ||||||
| 60–69 | 66 | 51.5 | 5.0 | 60–69 | 976 | 50.1 | 2.2 |
| 70–79 | 55 | 38.9 | 4.5 | 70–79 | 699 | 34.3 | 1.6 |
| 80 and above | 22 | 9.6 | 3.0 | 80 and abovsym | 473 | 15.6 | 1.8 |
| Gender | Gender | ||||||
| Male | 30 | 21.9 | 3.0 | Male | 1045 | 43.9 | 1.4 |
| Female | 113 | 78.1 | 3.0 | Female | 1103 | 56.1 | 1.4 |
| Race/ethnicity | Race/ethnicity | ||||||
| Non-Hispanic White | 84 | 83.0 | 2.3 | Non-Hispanic White | 1219 | 83.1 | 2.0 |
| Non-Hispanic Black | 17 | 5.1 | 1.1 | Non-Hispanic Black | 400 | 7.7 | 1.1 |
| Mexican American | 32 | 2.6 | 0.9 | Mexican American | 439 | 2.3 | 0.3 |
| Others | 10 | 9.3 | 1.6 | Others | 90 | 6.9 | 1.5 |
| Education | Education | ||||||
| Less than or equal to 12 | 113 | 69.8 | 4.1 | Less than or equal to 12 | 1693 | 71.3 | 2.8 |
| Greater than 12 | 29 | 30.2 | 4.1 | Greater than 12 | 443 | 28.7 | 2.8 |
| BMI | BMI | ||||||
| Underweight/normal | 47 | 34.8 | 5.5 | Underweight/normal | 707 | 34.9 | 2.3 |
| Overweight | 54 | 41.4 | 4.9 | Overweight | 895 | 40.2 | 1.5 |
| Obese | 42 | 23.9 | 4.6 | Obese | 542 | 24.9 | 1.2 |
| Occupation | Occupation | ||||||
| Manual | 72 | 45.9 | 4.8 | Manual | 1225 | 47.1 | 2.5 |
| Non-manual | 71 | 54.1 | 4.8 | Non-manual | 923 | 52.9 | 2.5 |
| Smoking | Smoking | ||||||
| Yes | 29 | 17.6 | 5.5 | Yes | 463 | 20.0 | 2.1 |
| No | 114 | 82.4 | 5.5 | No | 1684 | 80.0 | 2.1 |
| TSH levels | TSH levels | ||||||
| Hyperthyroidism | 13 | 8.8 | 2.7 | Hyperthyroidism | 84 | 3.7 | 0.6 |
| Euthyroidism | 70 | 43.5 | 3.4 | Euthyroidism | 1899 | 89.0 | 1.0 |
| Hypothyroidism | 60 | 47.7 | 3.7 | Hypothyroidism | 165 | 7.3 | 0.8 |
| Thyroid disease | Thyroid disease | ||||||
| Yes | 26 | 19.0 | 4.6 | Yes | 119 | 7.3 | 0.8 |
| No | 117 | 81.0 | 4.6 | No | 2027 | 92.7 | 0.8 |
| Diabetes | Diabetes | ||||||
| Yes | 24 | 11.3 | 3.0 | Yes | 331 | 11.6 | 1.1 |
| No | 119 | 88.7 | 3.0 | No | 1815 | 88.4 | 1.1 |
| Gout | Gout | ||||||
| Yes | 4 | 2.5 | 1.8 | Yes | 125 | 6.3 | 1.1 |
| No | 139 | 97.5 | 1.8 | No | 2023 | 93.7 | 1.1 |
| Lupus | Lupus | ||||||
| Yes | 0 | 0.0 | 0.0 | Yes | 6 | 0.6 | 0.4 |
| No | 143 | 100.0 | 0.0 | No | 2141 | 99.4 | 0.4 |
| Goiter | Goiter | ||||||
| Yes | 7 | 6.6 | 2.7 | Yes | 48 | 2.4 | 0.4 |
| No | 136 | 93.4 | 2.7 | No | 2099 | 97.6 | 0.4 |
| Continuous variables | n | Mean | SD | Continuous variables | n | Mean | SD |
| TPOAb | 143 | 133.10 | 102.10 | TPOAb | 2148 | 1.23 | 3.60 |
| TgAb | 143 | 49.88 | 224.81 | TgAb | 2148 | 5.88 | 59.27 |
| T4 | 142 | 8.33 | 2.74 | T4 | 2146 | 8.59 | 2.22 |
| RFP | 142 | 6.76 | 45.63 | RFP | 2136 | 47.48 | 358.59 |
| CRP | 142 | 0.63 | 1.05 | CRP | 2145 | 0.54 | 0.90 |
| Age | 143 | 69.72 | 6.75 | Age | 2148 | 70.70 | 7.60 |
| BMI | 143 | 27.45 | 5.82 | BMI | 2144 | 27.05 | 4.97 |
BMI, body mass index; CRP, C-reactive protein; n, sample size; RKOA, radiographic knee osteoarthritis; RFP, rheumatoid factor; SD, standard deviation; SE, standard error; sRKOA, symptomatic radiographic knee osteoarthritis; T4, thyroxine; TgAb, anti-thyroglobulin antibody; TPOAb, anti-thyroid peroxidase antibody; TSH, thyroid-stimulating hormone.