Interleukin-34 Synovial Fluid Was Associated with Knee Osteoarthritis Severity: A Cross-Sectional Study in Knee Osteoarthritis Patients in Different Radiographic Stages

Table 4

Linear regression for the association between variables and WOMAC scores.

Variables	Univariant		Multivariant
	(95% CI)	value	(95% CI)	value
Age	0.004 (−0.003–0.010)	0.305	0.002 (−0.007–0.011)	0.672
Sex	−0.024 (−0.165–0.118)	0.742	0.045 (−0.009–0.180)	0.510
BMI	0.023 (−0.009–0.054)	0.157	0.016 (−0.024–0.056)	0.429
Serum IL-34 levels	<0.001 (−0.001–0.001)	0.683	<0.001 (−0.001–0.001)	0.761
SF IL-34 levels	0.038 (0.020–0.056)	<0.001	0.020 (0.001–0.038)	0.035
KL grade	0.244 (0.170–0.318)	<0.001	0.212 (0.130–0.293)	<0.001

All abbreviations are as in Tables 1 and 2.