Table A4.

Plasma glucose (mmol/L) for and cumulative GDM incidence by unadjusted OGTT and adjusted by the basic linear adjustment used by Song et al. or FC Mix algorithm in regional ORCHID participants who attended clinics within remoteness classification MMM2 and MMM3.

OGTT Sample	OGTT by Standard Procedures			Standard OGTT Adjusted by Song et al. Algorithm			Standard OGTT Adjusted by FC Mix Algorithm
	Median Delay to Analysis (h)	PG	Cumulative GDM Diagnosis	PG	PG Difference vs. Standard Protocol	Cumulative GDM Diagnosis	PG	PG Difference vs. Standard Protocol	Cumulative GDM Diagnosis
Fasting	4.9 (3.6–6.2)	4.33 ± 0.44	19 (5.2)	4.82 ± 0.49	0.49 ± 0.06	93 (25.3)	5.04 ± 0.43	0.71 ± 0.12	167 (45.4)
1-h	3.8 (2.5–5.1)	7.03 ± 1.79	34 (9.2)	7.60 ± 1.93	0.57 ± 0.15	109 (29.6)	7.80 ± 1.85	0.78 ± 0.15	179 (48.6)
2-h	2.9 (1.5–4.2)	5.99 ± 1.50	43 (11.7)	6.35 ± 1.59	0.37 ± 0.09	118 (32.1)	6.62 ± 1.62	0.64 ± 0.20	186 (50.5)

OGTT = 75 g oral glucose tolerance test; FC Mix = fluoride-oxalate-EDTA; ORCHID = Optimisation of Rural Clinical and Haematological Indicators for Diabetes in pregnancy study; MMM = Modified Monash Model. Data are median (interquartile range) in hours for delay to analysis or mean ± SD for plasma glucose or difference in plasma glucose for ORCHID study participants who attended clinics within MMM remoteness classification categories 2 or 3 and completed OGTT (n = 368). These clinics were selected due to similarities with the region serviced by Ballarat Health Services (MMM category 2–5). The ORCHID study did not have sites within MMM 4 or 5 remoteness classification categories.