. 2024 Apr 25;14(4):e082237. doi: 10.1136/bmjopen-2023-082237

Table 3.

Measures in the Danish Diabetes Birth Registry-2 at birth and after birth for women, partners and children

Timing	Level of participation
	Basic information	Additional information
Birth
Women	Medical record: Gestational age at birth, date of birth, preterm delivery (<37 weeks), reason for preterm delivery, birth injuries, postpartum bleeding, mortality (cause of death), mode of delivery (indication for caesarean section), induction of delivery (reason to induce the delivery, method), hospitalisation (number of days), use of epidural blockade, fever during delivery.
Child	Medical record: Demographics (sex, gestational age, birth weight, crown-heel length, head circumference, abdominal circumference, Apgar score). Neonatal outcome (major congenital malformations, birth injury, shoulder dystocia, respiratory distress, transient tachypnoea, neonatal hypoglycaemia, systemic infections, admission to neonatal intensive care unit, number of admission days, hyperbilirubinaemia, cord blood pH), death, reason for death.	Biological samples (cord blood sample or filter paper): Genetic risk score, epigenetic markers, small RNAs, inflammatory cytokines, metabolic markers, proteomics, serum and plasma for future biobank.
1 month after delivery
Women	Medical record and visit or telephone call: Lactation status, weight, HbA_1c, insulin dose, number of mild hypoglycaemia the previous week and severe hypoglycaemia since delivery. CGM uploads.	Questionnaire 3–6 weeks after delivery: Health status (SF-12, version 2),⁶⁸ diet (SSQ, FFQ), sleep (PSQI),⁷⁴ changes in psychopathology and psychotropic medication use (SSQ), changes in contact with a psychologist/psychiatrist (SSQ) well-being (WHO-5),^{75 76} depression (EPDS),^{77 78} perceived stress (PSS),^{79 80} loneliness (T-ILS),⁸¹ diabetes-related distress (PAID),^{79 80} fear of hypoglycaemia (HFS-II-w),⁸³ breastfeeding practices and experiences,^96–98 satisfaction with care (PACIC).⁹²
Child	Medical record and visit or telephone call: Length and weight. If the data are collected by telephone, we will include data on weight and length by using the measurements from the last visit of the routine health nurses (planned visits at 7 days and 1 month after delivery). Presence of congenital malformations. Days with hospitalisation within the first month of life since discharge after delivery.
Partner		Questionnaire 3–6 weeks after delivery: Health status (SF-12, V.2),⁶⁸ physical activity (PAS-2),^93–95 diet (FFQ), sleep (PSQI),⁷⁴ changes in psychopathology and psychotropic medication use (SSQ), changes in contact with a psychologist/psychiatrist (SSQ), well-being (WHO-5),^{75 76} depression (EPDS),^{77 78} perceived stress (PSS),^{79 80} loneliness (T-ILS).⁸¹

CGM, continuous glucose monitoring; EPDS, Edinburgh Postnatal Depression Scale; FFQ, Food Frequency Questionnaire; HbA_1c, Hemoglobin A1c; HFS-II-w, Hypoglycaemia Fear Survey-II – worry subscale; PACIC, Patients Assessment Chronic Illness Care; PAID, Problem Areas in Diabetes; PAS-2, Physical Activity Scale 2; PSQI, Pittsburgh Sleep Quality Index; PSS, Perceived Stress Scale; SF12, 12 Item Short-Form (SF-12); SSQ, Study Specific Question; T-ILS, Three Item Loneliness Scale; WHO-5, WHO - Five Well-Being Index.