Table 2.

Fail-safe numbers of all groups for the studies.

	Number of studies	Fail-safe number
		α = 0.05	α = 0.01
All diabetic patients	35	1799.584	873.894
Subgroup of type 1 diabetes	11	101.251	44.612
Subgroup of type 2 diabetes	21	936.340	453.288
Subgroup of case-control	20	491.393	233.356
Subgroup of cross-sectional study	15	393.769	187.513
Subgroup of biopsy	6	78.977	36.010
Subgroup of other methods	29	1100.883	530.770