Table 2.

Factors influencing decision fatigue in surrogate decision-makers

Categories	Specific factors		Number of studies(%)
Demographic factor	household income [4, 14, 16–19, 21, 28, 29]		9(40.9%)
	gender [14, 17–19, 25]		5(22.7%)
	disease severity [15, 27, 30]		3(13.6%)
	occupational status [18, 24, 32]		3(13.6%)
	educational attainment [4, 14, 18]		3(13.6%)
Decision behavior factor	decision-making conflict [1, 28, 29]		3(13.6%)
	number of decisions [29, 30]		2(9.1%)
	degree of disease knowledge [14, 18, 27–29]		5(22.7%)
Self-regulation factor	cognitive stress	decision-making self-efficacy [15, 17, 18, 20]	4(18.2%)
		sleep problems [16, 19, 22]	3(13.6%)
		Internal cognitive load [1, 8, 32]	3(13.6%)
		decision-making readiness [18, 21]	2(9.1%)
	emotional stress	family resistance level [14]	1(4.5%)
		stress level [14, 23]	2(9.1%)
		self-control [16, 19]	2(9.1%)
		willpower belief [16, 19, 27, 30, 31]	5(22.7%)
		Negative psychology [1, 22, 26, 28–31]	7(31.8%)
		expression inhibition [1, 8]	2(9.1%)
		mental toughness [24]	1(4.5%)
		intolerance of uncertainty [4]	1(4.5%)
		social support level [15, 18, 27, 28, 30]	5(22.7%)
Situational factor	temporal dimension	days of ward / ICU stay [1, 16–19, 25, 30]	7(31.8%)
		decision-making time [28, 29]	2(9.1%)
		duration of diagnosis [4]	1(4.5%)
	environmental dimension	working environment [23, 26, 32]	3(13.6%)