Table 1.

Overview of articles focusing on screening (n = 12) (alphabetic order)

Article	Country	Study design	Study population	Focus
Blatt et al. (2011) [23]	USA	Review of data from Quest Diagnostics	924,873 pregnant women	Characteristics of pregnant women
Cullinan et al. (2012a) [24]	Ireland	Hospital clinical data	9,842 pregnant women	Characteristics of the pregnant women
Cullinan et al. (2012b) [25]	Ireland	Hospital clinical data	4,414 pregnant women	Characteristics of the pregnant women
Gazmararian et al. (1996) [19]	USA	Review of prenatal care records	2,184 pregnant women	Characteristics of health care providers
				Characteristics of the pregnant women
Landon et al. (1990) [16]	USA	Cross-sectional mail survey	471 obstetricians and maternal-fetal specialists	Characteristics of health care providers
Marrero et al. (1992) [17]	USA	Mail survey	668 family practice physicians and obstetricians/gynaecologists	Characteristics of health care providers
Moses et al. (2003) [21]	Australia	Review of medical records	1,648 pregnant women	Characteristics of health care setting
Nielsen et al. (2012) [15]	Various developing countries	Qualitative. Interviews and questionnaire.	10 GDM project implementers	Barriers mentioned by project implementers
Pedula et al. (2009) [26]	USA	Review of medical records	21,758 pregnancies	Characteristics of the pregnant women
Ruengkhachorn (2006) [20]	Thailand	Review of antenatal care records	159 pregnant women	Characteristics of health care setting
				Characteristics of the pregnant women
Sievenpiper et al. (2012) [18]	Canada	Audit	1,026 pregnant women	Characteristics of health care providers
				Characteristics of the pregnant women
Yapa & Simmons (2000) [22]	New Zealand	Review of hospital medical records	4,885 pregnant women	Characteristics of the pregnant woman