First metatarsophalangeal joint synovial hypertrophy associated with vitamin D status in type 2 diabetes mellitus: An ultrasound-graded study

Table 4 Threshold effect of serum 25-hydroxyvitamin D on the degree of synovial hypertrophy of the first metatarsophalangeal joint using the segmentation logistic regression model

Inflection points of 25(OH)D (ng/mL)	OR (95%CI)	P value
< 23.8	0.79 (0.67, 0.94)	0.0078
> 23.8	1.06 (0.96, 1.17)	0.2465
Log-likelihood ratio test		0.007

Adjusted: Age and albumin. 25(OH)D: 25-hydroxyvitamin D; OR: Odds ratio; CI: Confidence interval.