Table 2 K-DPP implementation evaluation measures, data sources and their calculations
Evaluation measures | Description | Data sources | Collected by | Time points | Data analysis |
|---|---|---|---|---|---|
Provider-level factors | |||||
 Penetration | Penetration into the target population | Recruitment records | Intervention team | At the beginning of the program | Numerator: # of individuals approached or invited to engage in the program Denominator: # of individuals in the target population |
 Implementation | Delivery of intervention components and adherence to intervention protocol | Peer-leader training evaluation questionnaire, attendance sheet and group session reports completed by peer leaders | Peer leaders; and/or intervention team (for attendance) | Training evaluation at the end of the training; Attendance record during each session; and Group session reports at the end of each session | Assessment of intervention components (peer leader training, group sessions, resource material and ongoing support) to ascertain their delivery as planned |
 Adoption | Provider-level (setting-level) participation | Group session reports completed by peer leaders | Peer leaders | At the end of each session | Numerator: # of polling areas enrolled in the program Denominator: total number of polling areas randomly selected for inclusion in the program, at the beginning of the program |
 Facilitators and barriers | Provider-level facilitators and barriers | Group session reports completed by peer leaders | Peer leaders | At the end of each session | Assessment of facilitators and barriers to intervention delivery |
Participant-level factors | |||||
 Reach | Proportion of eligible individuals enrolled in the program | Recruitment records | Intervention team | At the beginning of the program | Numerator: # of participants enrolled in the program Denominator: # of eligible individuals |
 Participation | Participants’ attendance in the program | Attendance sheet/recruitment records | Peer leaders and/or intervention team | During each session | Average attendance in 15 group-based sessions |
Participants’ retention in the program | As needed | Numerator: # of participants who provided measurements at 12-months Denominator: # of participants enrolled in the program | |||
 Effectiveness | Effectiveness according to primary and secondary outcomes | Clinical measurements records | Intervention team | At baseline, 12 months and 24 months | Numerator: # of participants who developed diabetes at 24 months Denominator: # of individuals who provided measurements at 24 months Changes in clinical and behavioural characteristics from baseline to 12 and/or 24 months. |
 Adoption | Participation in goal setting for behaviour change | Intervention participants evaluation questionnaire | Intervention participants | At 12 months | Numerator: # of participants who made change(s) to their lifestyle to meet their goals Denominator: # of participants who set goals for behaviour change Numerator: # of participants who were willing to adhere to the lifestyle change after the intervention Denominator: # of participants who made lifestyle change(s) |
Utilisation of diabetes education resource materials | Numerator: # of participants who utilised the diabetes education resource materials Denominator: # of participants who received the diabetes education resource materials | ||||
Participants’ satisfaction with the program | Participants’ satisfaction with the peer-led groups based on a series of questions asked at the end of 12-months | ||||
 Evaluation of control participants | Evaluation of control participants at 12-months | Control participants evaluation questionnaire | Control participants | At 12 months | Participant’s use of health information booklet and behaviour changes made by participants over the duration of the intervention |
 Facilitators and barriers | Participant-level facilitators and barriers | Intervention participants evaluation questionnaire | Intervention participants | At 12 months | Assessment of facilitators and barriers to participate in the program |
Community-level factors | |||||
 Community activities | Participation in community activities outside group sessions | Intervention participants evaluation questionnaire | Intervention participants | At 12 months | Numerator: # of participants who took part in community activities Denominator: # of participants enrolled in the program |
 Community support | Frequency of additional contacts between peer leader and group member and among group members outside the group sessions | Intervention participants evaluation questionnaire | Intervention participants | At 12 months | Numerator: # of participants who contacted their peer leaders/group members outside the group sessions Denominator: # of participants enrolled in the program An average number of contacts made during the intervention. |
Support received during the intervention period from sources other than K-DPP | Numerator: # of participants who received support from other community sources Denominator: # of participants enrolled in the program | ||||
 Facilitators and barriers | Community-level facilitators and barriers to participation and/or intervention delivery | Ongoing interactions between peer leaders and the K-DPP intervention team including telephone calls and face-to-face meetings Group session reports completed by peer leaders | Intervention team | Ongoing | Assessment of community-level facilitators and barriers |