For each participant and each follow-up visit we calculated expected visit date, date visit window opened, date visit window closed, logged whether the visit was completed, visit completion date, and made notes about the participant's status with the study and our attempts at contact.
Eligible women were approached for recruitment after clinic visit completion.
Data return rates and visit completion rates by socio-economic status.
Visit completion rates did not differ significantly by socio-economic status.
Visit completion for the six protocol-specified follow-up visits was 100% in the intensive group and 89% in the usual-care group (Supplementary Fig. 1).
Visit retention may be supported by various strategies: participant-tracking; home and workplace visits; short messaging service (SMS) reminders; global positioning system (GPS) locators; improving the quality of clinical services; rewards and incentives for visit completion [ 13].
The visit completion rate was >99% in the CGM group and 98% in the control group (supplementary Fig. A1, available in an online appendix at http://care.diabetesjournals.org/cgi/content/full/dc09-0108/DC1), and the phone contact completion rates were 98 and 95%, respectively.
We found that a high number of call attempts spread out over a period of months, specifically including multiple weeks in which no calls were placed, did lead to additional visit completions.
Earnings were divided among eight CM targets; two PN-related (PN visits; paperwork completion; 26% of possible earnings), four health-related (HIV care visits, lab blood draw visits, medication check, viral load suppression; 47% of possible earnings) and two drug-use abatement (treatment entry; submission of drug negative UAs; 27% of earnings).
The participants then performed a 4-km TT familiarisation trial, followed by a further five separate visits requiring completion of the same exercise following ingestion of either 0.2 g kg−1 BM NaHCO3 twice (SBC2a and SBC2b), 0.3 g kg−1 BM NaHCO3 twice (SBC3a and SBC3b) or a control treatment entailing no supplementation in a randomised order.
