Table 2.

Simple linear regression analysis for the imaging parameters

Thermala versus ultrasound imaging parameters	β coefficient (95% CI)	P value
Right elbow
MIN versus Total GS score	0.15 (0.01, 0.28)	0.033*
MAX versus Total GS score	0.16 (0.02, 0.30)	0.030*
AVG versus Total GS score	0.15 (0.03, 0.28)	0.020*
MIN versus Total PD score	0.09 (0.01, 0.16)	0.029*
MAX versus Total PD score	0.11 (0.03, 0.18)	0.009**
AVG versus Total PD score	0.09 (0.02, 0.16)	0.018*
Left elbow
MIN versus Total GS score	0.04 (− 0.07, 0.16)	0.430
MAX versus Total GS score	0.11 (− 0.02, 0.23)	0.086
AVG versus Total GS score	0.08 (− 0.04, 0.19)	0.172
MIN versus Total PD score	0.06 (0.01, 0.10)	0.012*
MAX versus Total PD score	0.08 (0.03, 0.13)	0.002**
AVG versus Total PD score	0.07 (0.03, 0.11)	0.003**

CI confidence interval, GS greyscale, PD power Doppler

^aMAX, AVG and MIN are thermographic parameters derived from summing the respective Tmax, Tavg and Tmin at each elbow (medial, lateral, posterior and anterior aspects)

Statistically significant: *P < 0.05, **P < 0.01