Table 6.

Saturation effect analysis of WWI(cm/√kg) on rheumatoid arthritis prevalence

	Model:Saturation effect analysis
WWI turning point (K)	11.21
< K,effect1	1.53 (1.26, 1.86) < 0.0001
> K,effect2	0.97 (0.85, 1.11) 0.6473
Log-likelihood ratio	< 0.001

Age; gender; race; diabetes; PIR; ALT; AST; ALP; BUN; total calcium; uric acid; total cholesterol; triglyceride; LDL-C; direct HDL-C; diabetes status; education level; smoking status; alcohol abuse; sleep disorders; moderate recreational activities were adjusted

Abbreviation: PIR ratio of family income to poverty, BMI body mass index, LDL-C low-density lipoproteincholesterol, HDL-C high-density lipoprotein cholesterol, AST aspartate aminotransferase, ALT alanine aminotransferase, ALP alkaline phosphatase, BUN blood urea nitrogen