Table 3.

Improvement in prediction when adding HGS thresholds to the office-based risk score.

	C index (95% CI)	C index change (95% CI)	p value
All participants
Office-based risk score	0.720 (0.701–0.738)	0.022 (0.020–0.024)	<0.001
Plus HGS	0.742 (0.725–0.760)
Urban population
Office-based risk score	0.716 (0.609–0.738)	0.025 (0.021–0.029)	<0.001
Plus HGS	0.741 (0.723–0.759)
Rural population
Office-based risk score	0.724 (0.689–0.766)	0.019 (0.018–0.021)	<0.001
Plus HGS	0.743 (0.712–0.781)

HGS, handgrip strength.