Table 2.

Characteristics of the included studies.

Lead author	Country	Patient age range	Mean age	Screening strategy	Index test (PoC)		Reference test
					Number screened	Screen positive	Number attended	Diagnosed
								PD	DM
Mulligan et al. [41]	USA	≥65	74.2	RBG (PoC) > OGTT	73	46	73	—	8
Lalla et al. [21]	USA	≥30	53	HbA1c (PoC) > FPG	535	n/a	506	161	21
Engström et al. [40]	Sweden	20–75	48.6	RBG (PoC) > n/a	1568	155	139	—	9
AlGhamdi et al. [37]	SA	≥40	48.9	RBG (PoC) > OGTT	385	153	128	56	59
Akyil et al. [42]	Turkey	≥20	n/a	RBG (PoC) > OGTT	436	88	208	—	20
Genco et al. [7]	USA	≥45	55	HbA1c (PoC) > HbA1c	1017	416	146	34	18
Franck et al. [38]	USA	n/a	n/a	HbA1c (PoC) > HbA1c	74	34	28	26	2
Herman et al. [43]	USA	≥30	52.8	RBG (PoC) > HbA1c	1033	354	181	57	3
Biethman et al. [39]	USA	≥30	59.6	HbA1c (PoC) > n/a	74	34	20	8	1

RBG, random blood glucose; FPG, fasting plasma glucose, PoC, point of care; HbA1c, glycated haemoglobin; OGTT, oral glucose tolerance test; PD, prediabetes; DM, diabetes mellitus.