Table 1.
Baseline characteristics of study population by arthritis status at follow-up
| Total (n = 4418) |
Non- Arthritis (n = 4022) |
Arthritis (n = 396) |
P | |
|---|---|---|---|---|
| Age, Median (P25, P75) | 57 (50, 63) | 57 (50, 63) | 57 (50, 62) | 0.59 |
| Gender, n (%) | < 0.01 | |||
| Female | 2184 (49.43) | 1963 (48.81) | 221 (55.81) | |
| Male | 2234 (50.57) | 2059 (51.19) | 175 (44.19) | |
| Marital, n (%) | 0.65 | |||
| Married | 4005 (90.65) | 3649 (90.73) | 356 (89.9) | |
| Non-Married | 413 (9.35) | 373 (9.27) | 40 (10.1) | |
| Education, n (%) | < 0.01 | |||
| Elementary school and below | 2786 (63.06) | 2511 (62.43) | 275 (69.44) | |
| High school | 1069 (24.2) | 977 (24.29) | 92 (23.23) | |
| College and higher | 563 (12.74) | 534 (13.28) | 29 (7.32) | |
| Location, n (%) | 0.07 | |||
| Urban | 4038 (91.4) | 3666 (91.15) | 372 (93.94) | |
| Rural | 380 (8.6) | 356 (8.85) | 24 (6.06) | |
| Smoking, n (%) | 0.12 | |||
| Never | 2621 (59.33) | 2368 (58.88) | 253 (63.89) | |
| Former smoker | 335 (7.58) | 305 (7.58) | 30 (7.58) | |
| Current smoker | 1462 (33.09) | 1349 (33.54) | 113 (28.54) | |
| Drinking, n (%) | 0.05 | |||
| None of these | 2829 (64.03) | 2553 (63.48) | 276 (69.7) | |
| Drink but less than once a month | 377 (8.53) | 347 (8.63) | 30 (7.58) | |
| Drink more than once a month | 1212 (27.43) | 1122 (27.9) | 90 (22.73) | |
| Sleep time, Median (P25, P75) | 7 (6, 8) | 7 (6, 8) | 7 (5, 8) | 0.12 |
| Diabetes, n (%) | 524 (11.86) | 466 (11.59) | 58 (14.65) | 0.09 |
| Hypertension, n (%) | 1725 (39.04) | 1594 (39.63) | 131 (33.08) | 0.01 |
| BMI, Median (P25, P75) | 23.07 (20.92, 25.36) | 23.06 (20.91, 25.35) | 23.23 (21.09, 25.48) | 0.56 |
| Glucose (mg/dl), Median (P25, P75) | 101.88 (94.14, 111.24) | 101.88 (94.14, 111.24) | 101.34 (94.27, 111.28) | 0.87 |
| TG (mg/dl), Median (P25, P75) | 101.78 (73.46, 152) | 100.89 (72.57, 149.57) | 109.74 (79.65, 162.18) | < 0.01 |
| HDL-C (mg/dl), Median (P25, P75) | 49.1 (40.21, 59.92) | 49.1 (40.21, 59.92) | 48.71 (39.82, 57.99) | 0.09 |
| LDL-C (mg/dl), Median (P25, P75) | 114.05 (93.56, 135.7) | 114.05 (93.56, 135.31) | 112.89 (93.17, 138.79) | 0.71 |
| CRP (mg/dl), Median (P25, P75) | 0.92 (0.5, 1.82) | 0.92 (0.5, 1.82) | 1.00(0.52, 1.86) | 0.55 |
| TyG, Median (P25, P75) | 8.56 (8.19, 9.01) | 8.55 (8.19, 9.01) | 8.64 (8.26, 9.11) | < 0.01 |
Note: p-Values were calculated from chi-square tests (categorical variables) or rank-sum tests (continuous variables without normal distribution), or t-tests (continuous variables with normal distribution)