Table 4.

Subgroup analyses stratified by race

	Model 1, β (95% CI, P)	Model 2, β (95% CI, P)	Model 3, β (95% CI, P)
Non-Hispanic White
Non-arthritis	Reference	Reference	Reference
Osteoarthritis or degenerative arthritis	0.009 (− 0.009, 0.026) 0.3439	0.018 (− 0.000, 0.036) 0.0501	0.019 (0.001, 0.037) 0.0382
Rheumatoid arthritis	− 0.015 (− 0.045, 0.015) 0.3222	− 0.007 (− 0.036, 0.023) 0.6699	0.001 (− 0.028, 0.031) 0.9232
Non-Hispanic Black
Non-arthritis	Reference	Reference	Reference
Osteoarthritis or degenerative arthritis	− 0.020 (− 0.050, 0.009) 0.1806	0.003 (− 0.027, 0.034) 0.8340	0.007 (− 0.024, 0.037) 0.6611
Rheumatoid arthritis	0.008 (− 0.031, 0.046) 0.6947	0.032 (− 0.007, 0.071) 0.1105	0.032 (− 0.007, 0.071) 0.1035
Mexican American
Non-arthritis	Reference	Reference	Reference
Osteoarthritis or degenerative arthritis	0.015 (− 0.025, 0.056) 0.4579	0.032 (− 0.008, 0.073) 0.1189	0.017 (− 0.023, 0.057) 0.4103
Rheumatoid arthritis	− 0.022 (− 0.061, 0.018) 0.2899	− 0.004 (− 0.044, 0.036) 0.8602	− 0.006 (− 0.046, 0.033) 0.7621

Adjusted for age, gender, educational level, body mass index, ratio of family income to poverty, vigorous recreational activities, smoked at least 100 cigarettes in life, blood urea nitrogen, total protein, total cholesterol, alkaline phosphatase, serum uric acid, serum sodium, serum potassium, serum phosphorus, and serum calcium