Table 3.

Prediction results of the three different walking speed models of the XGBoost in the risk of falls.

Models	AUC (95% CI)	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)	PLR (95% CI)	NLR (95% CI)
Slower speed	0.71 (0.64–0.78)	0.43 (0.33–0.54)	0.84 (0.76–0.89)	0.63 (0.50–0.75)	0.69 (0.62–0.76)	2.65 (1.69–4.16)	0.68 (0.56–0.83)
Preferred speed	0.71 (0.64–0.78)	0.53 (0.42–0.64)	0.81 (0.73–0.87)	0.64 (0.52–0.75)	0.73 (0.65–0.80)	2.77 (1.87–4.12)	0.58 (0.45–0.73)
Faster speed	0.72 (0.66–0.79)	0.51 (0.40–0.62)	0.77 (0.69–0.84)	0.59 (0.47–0.70)	0.71 (0.63–0.78)	2.23 (1.54–3.23)	0.63 (0.53–0.83)

AUCarea under the curve, NLR negative likelihood ratio, NPV negative predictive value, PLR positive likelihood ratio, PPV positive predictive value, CI confidence interval.