Fig 1.
Study design (data acquisition, linkage and analysis).
Note: ‘HASHES for record linkage’ refer to strings of letters and numbers generated by a one-way mathematical algorithm—that is, a function which it is infeasible to reverse or invert. Such algorithms are known as cryptographic ‘hash’ functions. Such hashes are generated whilst the data is still held by the original custodian of the data. When data is exported, person identifiers are left behind leaving only the non-reversible ‘hashes’. These are subsequently used to undertake privacy-preserving record linkage.
Fig 2.
Timeline of GDM test and type 2 diabetes follow-up in relation to the NGDR NGDR—national gestational diabetes register.
Table 1.
Raw data availability in Victoria and South Australia (2012 and 2013).
(Includes pathology data prior and subsequent to birth. HbA1c almost all used at one year follow-up).
Fig 3.
NGDR registration in days prior to and after baby birth for 2012 and 2013 NGDR—national gestational diabetes register.
Table 2.
GDM screening and follow-up rates.
Fig 4.
Pathology testing for 2012–2013 NGDR registered women in the weeks prior to GDM registration (at time 0).
Table 3.
GDM and NGDR registration rates 2012–2013.
Fig 5.
Laboratory testing in Victoria and South Australia relative to the date of GDM registration; 1 year before registration -> 2 years after registration.
Fig 6.
Screening and recall 2010–2013, Victoria and SA.