Table 4.

Zero‐order correlations and stepwise multiple regression results of blast‐related variables, and education level, on functional connectivity in each visual system network

Zero‐order Spearmans ⍴ Correlations
	Number of mTBIs	Number of blast exposures	Education	LGN	V1	LO	FG
Blast mTBI severity score	0.969***	0.492***	0.004	−0.338***	−0.238**	−0.268**	−0.320***
Number of mTBIsa		0.472***	−0.01	−0.314***	−0.221*	−0.233**	−0.297***
Number of blast exposuresa			0.009	−0.183*	−0.175*	−0.141	−0.240**
Education				0.073	−0.035	0.059	0.103
	Stepwise multiple regression
	β	F	t	R	R 2
LGN model
Blast mTBI severity score	−0.336	15.96 ***		0.336	0.113
Number of mTBIs			0.257
Number of blast exposures			−0.658
Education			1.468
V1 model
Blast mTBI severity score			−0.513
Number of mTBIs	−0.263	9.295 **		0.263	0.069
Number of blast exposures			−0.176
Education			−0.023
LO model
Blast mTBI severity score	−0.277	10.37 **		0.277	0.077
Number of mTBIs			0.554
Number of blast exposures			−0.65
Education			1.268
FG model
Blast mTBI severity score	−0.307	13.017 ***		0.307	0.094
Number of mTBIs			−0.278
Number of blast exposures			−0.658
Education			1.519

*P < 0.05, **P < 0.01, ***P < 0.001.

Variables retained in each model are indicated in Bold print.

β, standardized beta weight; R, multiple correlation coefficient; R ², proportion of variance explained.

^aThe “number of blast exposures” variable reflects the self‐reported estimation of number of blast events that involved feeling the pressure wave; these reports were taken at face value and not separately reviewed by consensus raters of blast mTBI. In contrast, “numbers of mTBI” were carefully reviewed by consensus raters.