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Table 1—

Baseline characteristics from index pregnancy and routine follow-up for women with previous diet-treated GDM comparing participants and nonparticipants in the 2002 follow-up study

ParticipantsNonparticipantsP
n 481 272  
Age at index pregnancy (years) 31.7 (27.7–35.7) 30.6 (27.8–34.2) 0.114 
Prepregnancy BMI (kg/m225.1 (21.9–29.8) 26.9 (22.0–31.7) 0.035 
Gestational age at diagnosis (days) 227 (197–249) 227 (197–249) 0.842 
Gestational age at birth (days) 274 (267–278) 272 (265–278) 0.171 
Fasting plasma glucose at diagnosis (mmol/l) 5.0 (4.5–5.5) 5.1 (4.7–5.7) 0.059 
Nordic origin (%) 75.0 76.9 0.552 
Follow-up 2 months postpartum (%) 91.9 83.5 <0.0005 
IGT 2 months postpartum (%) 21.2 23.6 0.478 
Diabetes 2 months postpartum (%) 2.7 4.8 0.152 
Attendance to routine follow-up OGTT (%) 87.5 65.8 <0.0005 
Diabetes at latest routine follow-up (%) 24.4 36.8 0.001 
ParticipantsNonparticipantsP
n 481 272  
Age at index pregnancy (years) 31.7 (27.7–35.7) 30.6 (27.8–34.2) 0.114 
Prepregnancy BMI (kg/m225.1 (21.9–29.8) 26.9 (22.0–31.7) 0.035 
Gestational age at diagnosis (days) 227 (197–249) 227 (197–249) 0.842 
Gestational age at birth (days) 274 (267–278) 272 (265–278) 0.171 
Fasting plasma glucose at diagnosis (mmol/l) 5.0 (4.5–5.5) 5.1 (4.7–5.7) 0.059 
Nordic origin (%) 75.0 76.9 0.552 
Follow-up 2 months postpartum (%) 91.9 83.5 <0.0005 
IGT 2 months postpartum (%) 21.2 23.6 0.478 
Diabetes 2 months postpartum (%) 2.7 4.8 0.152 
Attendance to routine follow-up OGTT (%) 87.5 65.8 <0.0005 
Diabetes at latest routine follow-up (%) 24.4 36.8 0.001 

Data are median (interquartile range) unless otherwise indicated.

Women with previous GDM and without known diabetes are offered regular OGTT after delivery with 1- to 2-year intervals. Boldface data are significant.

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