Univariate analysis of the factors influencing the direct cost.

Table 5: Univariate analysis of the factors influencing the direct cost.

Qualitative variables		Mean ± SD^*	P value
Type of AKI	"Acquired in community"	455,484.3 ± 385,462	0.820
	"Acquired in hospitalization"	455,070.0 ± 418,711	0.820

Severity	Stage 1	287,082.6 ± 165,076	0.006^*
	Stage 2	435,826.6 ± 205,425
	Stage 3	860,334.5 ± 556,934

Dialysis	"Dialysis"	371,018.5 ± 261,387	≤ 0.001^*
	"No dialysis"	1,257,495.0 ± 466,009	≤ 0.001^*

Sex	Female	436,885.0 ± 387,205	0.580
	Male	475,860.7 ± 387,912	0.580

Quantitative Variables		Standardized coefficient "β"	P value
	Age (year)	-0.2	0.152
	Duration of hospitalization (days)	0.7	≤ 0.001^*
	Kidney function recovery time (days)	0.7	≤ 0.001^*

^*SD: Standard deviation.