Table 6. Multivariable linear regression analysis to identify contributors to organic acid concentrations.

	Organic acid concentration
	Total organic acid	Acetic acid	Butyric acid	Valeric acid
	β (p-value)	β (p-value)	β (p-value)	β (p-value)
Age	0.070 (0.53)	0.033 (0.76)	0.164 (0.16)	-0.284 (0.03)
Ischemic stroke	-0.237 (0.06)	-0.262 (0.04)	-0.017 (0.89)	0.340 (0.01)
Hypertension	0.050 (0.67)	0.013 (0.91)	-0.027 (0.82)	0.051 (0.70)
Type 2 diabetes	-0.064 (0.60)	-0.128 (0.30)	0.124 (0.33)	-0.035 (0.80)

β indicates the standardized regression coefficient.