A meta-analysis of the incidence rate of postoperative acute kidney injury in patients with congenital heart disease

Table 3 Results of subgroup analysis

Outcomes	No. of studies	IR(95%CI)	Heterogeneity test		P-sub
Outcomes	No. of studies	IR(95%CI)	P I² (%)		P-sub
Overall	30	0.384 (0.320, 0.447)	< 0.001	98.169	–
Location					0.291
Asia	9	0.436 (0.319, 0.554)	< 0.001	97.477
Western	21	0.361 (0.287, 0.436)	< 0.001	98.268
Type of surgery					0.694
CS for CHD	16	0.397 (0.324, 0.471)	< 0.001	98.024
CS for CHD with CPB	14	0.368 (0.242, 0.494)	< 0.001	98.343
Type of cohort					0.118
Prospective	10	0.451 (0.352, 0.550)	< 0.001	95.038
Retrospective	20	0.352 (0.376, 0.427)	< 0.001	98.446
Age					0.002
< 1 month	6	0.543 (0.452, 0.633)	0.002	73.164
1 month-18 years	14	0.416 (0.335, 0.496)	< 0.001	96.927
< 18 years	10	0.299 (0.209, 0.389)	< 0.001	97.854
≥ 18 years	3	0.300 (0.096, 0.505)	–	–
Criteria of AKI					0.471
pRIFLE	13	0.362 (0.255, 0.470)	< 0.001	98.584
AKIN	8	0.348 (0.242, 0.453)	< 0.001	96.643
KDIGO	9	0.447 (0.318, 0.576)	< 0.001	98.358

P-sub P value of the difference between subgroups; −-, not available. IR incidence rate

ISSN: 1471-2369