Table 3.

PDUS and Swollen Joint Agreement by BMI Group

	Overall	BMI < 25	BMI 25–30	BMI > 30	p
% Joints PDUS Positive	42%	54%	40%	30%	0.018
% Joints Swollen	44%	48%	37%	45%	0.611
% Agreement	66%	66%	66%	64%	0.713
Sensitivity	0.61	0.64	0.53	0.66	0.822
Specificity	0.68	0.70	0.74	0.64	0.691
PPV	0.59	0.71	0.58	0.44	0.023
NPV	0.71	0.62	0.71	0.81	0.084

PPV Positive Predictive Value, NPV Negative Predictive Value