Table 2.

Wald's tests assessment of the covariates effects on the hazard function

Selected brain metabolites ratios	B	SE	χ2 (Wald test)	p-value	Log-hazard functions	95.0% CI
						Lower	Upper
Cho/Naa ratio	0.983	0.448	4.821	0.028	2.672	1.111	6.423
LL/Cr ratio	−0.538	0.268	4.039	0.044	0.584	0.345	0.987
Age (years)	0.060	0.034	3.059	0.080	1.062	0.993	1.136

B, B values correspond to the standardized coefficient values in a constructed regression equation; CI, confidence interval; SE, standard error.