Table 2.

Sensitivity, specificity, positive predictive value, area under ROC curve of predictor variables associated with the presence of foot pain on most days in the last month

	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Area under ROC curve (%, 95 % CI)
Sex	59.28	49.80	35.67	54.54 (52.47–56.61)
Age 65 and over	29.25	77.14	37.36	53.19 (51.31–55.08)
Current smoker	16.42	83.97	32.46	50.19 (48.60–51.79)
Depressive symptoms	18.69	92.18	52.38	55.44 (53.91–56.96)
Intermediate to high alcohol risk	6.26	94.44	34.85	50.35 (49.31–51.40)
Not physically active	31.40	72.90	35.57	52.15 (50.08–54.22)
BMI obese	39.36	74.41	41.82	56.88 (54.83–58.94)
Diabetes	10.74	92.10	38.94	51.42 (50.13–52.71)
Arthritis	41.05	79.07	47.58	60.06 (58.06–62.06)
Foot pain	35.16	91.70	66.18	63.43 (61.61–65.24)
Heel pain	7.63	98.06	64.77	52.85 (51.84–53.86)
Ball pain	10.17	98.00	70.37	54.09 (52.95–55.23)
Arch pain	9.24	98.00	68.32	53.62 (52.52–54.71)
Nail pain	0.67	99.75	55.56	50.21 (49.89–50.53)
Toe pain	12.72	97.25	68.35	54.98 (53.72–56.25)
Forefoot pain	15.53	96.38	66.67	55.95 (54.57–57.33)
Hindfoot pain	9.50	97.25	61.74	53.38 (52.25–54.50)
Podiatry use	18.26	91.71	50.54	54.99 (53.47–56.50)
Hip pain/stiffness	18.72	91.86	51.47	55.29 (53.74–56.84)
Back pain/stiffness	48.76	68.39	41.56	58.58 (56.48–60.67)
Hand pain/stiffness	25.88	88.13	50.12	57.00 (55.27–58.74)
Shoulder pain/stiffness	35.16	80.23	45.06	57.70 (55.75–59.64)
Knee pain/stiffness	25.76	86.99	47.56	56.38 (54.62–58.13)