Page 108 - Exploring the Potential of Self-Monitoring Kidney Function After Transplantation - Céline van Lint

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This same procedure was used to calculate level of adherence to registration of measurement in the SMSS, i.e. whether patients registered measurements on the requested number of days.
Chapter 5
Figure 1. SMSS feedback system.
Figure 1. Possible feedback combinations in the SMSS.
2.4. Measures Moment of registration
Serum creatinine (μmol/l) values measured around baseline (0-30 days post-discharge) and 12 month Date of measurement (derived from device logged data) was compared to the date of registration of
follow-up (301 -426 days post-discharge) were obtained from the electronic hospital file. The width of this measurement (derived from SMSS logged data). Per patient the average number of days delay
these timeframes was determined by the availability of at least 1 creatinine value per patient. The between measurement and registration was calculated. Further, we investigated whether delayed
same timeframes were used to obtain systolic and diastolic blood pressure (mmHg). A mean serum registration was related to stability of creatinine level by comparing feedback that was generated by
creatinine and systolic and diastolic blood pressure was calculated for baseline and follow-up using the the SMSS in case of registration on day of measurement with feedback that was generated when
available measurements within the two timeframes. Kidney function (eGFR) was calculated with the registration was delayed.
Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula[28]. Number of outpatient contacts, serious adverse events (SAEs, i.e. hospitalizations) and rejection episodes within 365 days from discharge were obtained from the electronic hospital file. To investigate whether replacing ftf visits with telephonic consults led to a decrease in total healthcare consumption, total number of minutes spent per patient in the first 365 days from discharge was calculated including all ftf visits (10 minutes), telephonic consults (5 minutes) and separate laboratory analyses (5 minutes). Self- monitored values registered online were obtained from the SMSS. Both the intervention and control group completed the Short Form-12 (SF-12) [29] to measure quality