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. 2016 Mar 2;18(3):e49. doi: 10.2196/jmir.5069

Table 4.

Correlationsa and square root of average variance extractedb.

PEc EEd SIe FCf HMg PVh HTi SPj BIk UBl Age Gender CDm
PE .91                        
EE .47 .89










SI .31 .24 .98









FC .25 .57 .23 .79








HM .47 .44 .31 .32 .94







PV .42 .33 .34 .26 .42 .94






HT .43 .29 .55 .26 .48 .46 .81





SP .04 -.08 .15 -.06 .08 .08 .16 .72




BI .50 .43 .43 .29 .44 .35 .61 .17 .91



UB .23 .18 .39 .24 .17 .23 .41 .10 .44 N/An


Age -.01 -.04 .13 -.03 -.01 .08 .09 .08 .08 .20 N/A

Gender -.02 -.04 .05 0 -.08 .05 0 .05 -.03 0 .11 N/A
CD -.08 -.10 .02 -.08 -.06 -.02 .03 .24 .01 .13 .18 .09 N/A

aOff-diagonal elements are correlations.

bDiagonal elements are square roots of average variance extracted.

cPE: performance expectancy.

dEE: effort expectancy.

eSI: social influence.

fFC: facilitating conditions.

gHM: hedonic motivation.

hPV: price value.

iHT: habit.

jSP: self-perception.

kBI: behavioral intention.

lUB: use behavior.

mCD: chronic disability.

nN/A: not applicable, because they are not reflective constructs.