. Author manuscript; available in PMC: 2018 Jan 1.

Published in final edited form as: Arthritis Rheumatol. 2017 Jan;69(1):103–107. doi: 10.1002/art.39829

Table 3.

Association between synovial fluid white cell count and within person change in pain between baseline and follow up

Variable	Synovial fluid white cell count (cells/mm³)	Mean within person change in pain (SD)	Unstandardised coefficient	95% CI	Β^*	p
Pain
KOOS pain	≤100	12.5 (15.2)	referent
	101–250	21.3 (20.6)	11.1	(0.03 – 22.17)	0.279	0.049
	251–1000	29.3 (15.2)	15.07	(2.06 – 28.09)	0.320	0.024
Nominated VAS	≤100	−1.9 (2.3)	referent
	101–250	−3.1 (2.8)	−1.4	(−3.12 – 0.32)	−0.242	0.107
	251–1000	−4.0 (3.2)	−1.82	(−3.81 – 0.17)	−0.272	0.072

Results of linear regression.

Abbreviations: β*- standardised beta coefficient. KOOS - Knee Injury and Osteoarthritis Outcome score