Participants assessed the severity of diabetic gastroparesis symptoms daily using the Diabetic Gastroparesis Symptom Severity Diary (DGSSD), recorded in an electronic diary (e-diary). The DGSSS was derived as the sum of the weekly averages of the 4 DGSSD items: nausea, abdominal pain, postprandial fullness and bloating. Each symptom was scored using an 11-point ordinal scale where: 0= no or not at all uncomfortable to 10= worst possible or most uncomfortable for a total possible DGSSS of 0 (best) to 40 (worst). A negative change from Baseline indicates improvement. Baseline was defined as the average of the 2 weekly DGSSS from the run-in period.

Modified Intent-to-treat (mITT) Population included all randomized participants with ≥1 postbaseline assessment of DGSSD.

The number of vomiting episodes in the previous 24 hours were assessed daily by the participant using the DGSSD and were recorded in the e-diary. A Vomiting Responder was defined as a participant with zero weekly vomiting episodes during each of the last 6 weeks of the 12-week Treatment Period.

mITT Population included all randomized participants with ≥1 postbaseline assessment of DGSSD.

A Nausea Responder was defined as a participant with improvement (decrease) of at least 2-points in the weekly symptom scores for nausea at each of the last 6 weeks of the 12-week Treatment Period. Nausea was one of the items of the DGSSD assessed daily and recorded in the e-diary by the participant using an 11-point ordinal scale where: 0= no nausea to 10= worst possible nausea.

mITT Population included all randomized participants with ≥1 postbaseline assessment of DGSSD.

An Abdominal Pain Responder was defined as a participant with an improvement (decrease) of at least 2-points in the weekly symptom scores for abdominal pain at each of the last 6 weeks of the 12-week Treatment Period. Abdominal pain was one of the items of the DGSSD assessed daily and recorded in the e-diary by the participant using an 11-point ordinal scale where: 0= no abdominal pain to 10= the worst possible abdominal pain and was recorded in an e-diary.

mITT Population included all randomized participants with ≥1 postbaseline assessment of DGSSD.

A Bloating Responder was defined as a participant with an improvement (decrease) of at least 2-points in the weekly symptom scores for bloating at each of the last 6 weeks of the 12-week Treatment Period. Bloating was one of the items of the DGSSD assessed daily and recorded by the participant in the e-diary using an 11-point ordinal scale where: 0= no bloating and 10= the worst possible bloating and was recorded in the e-diary.

mITT Population included all randomized participants with ≥1 postbaseline assessment of DGSSD.

A Postprandial Fullness Responder was defined as a participant with an improvement (decrease) of at least 2-points in the weekly symptom scores for Postprandial Fullness at each of the last 6 weeks of the 12-week Treatment Period. Postprandial Fullness was one of the items of the DGSSD assessed daily and recorded by the participant in the e-diary using an 11-point ordinal scale where: 0= no feeling of fullness until finishing a meal (best) to 10= feeling full after only a few bites (worst).

mITT Population included all randomized participants with ≥1 postbaseline assessment of DGSSD.

An adverse event (AE) is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment. A TEAE is an AE that begins or worsens after receiving study drug.

Safety Population included all participants who received ≥1 administration of double-blind study treatment.

Clinical Laboratory tests included Hematology, Chemistry and Urinalysis tests. The investigator determined if the results were clinically significant. Only those categories where at least 1 person had a non-PCS value at Baseline and met the PCS criterion at least once during postbaseline are reported.

Safety Population included all participants who received ≥1 administration of double-blind study treatment. Number analyzed is the number of participants with non-PCS baseline values and at least one post-baseline assessment.

Vital Signs included assessments of heart rate, respiratory rate, systolic and diastolic blood pressure, and body temperature. The investigator determined if the abnormal results were clinically significant.

Safety Population included all participants who received ≥1 administration of double-blind study treatment.

A standard 12-lead ECG was performed. The investigator determined if the abnormal results were clinically significant.

Safety Population included all participants who received ≥1 administration of double-blind study treatment.

Safety Population included all participants who received ≥1 administration of double-blind study treatment. Overall number analyzed is the number of participants with non-PCS baseline values and at least one post-baseline assessment.

A blood sample was collected that was sent to a laboratory for an anti-relamorelin antibody screening test. A positive screening test was confirmed by an immunodepletion assay. The number of participants in each of the following categories are reported: Negative Screening Test, Positive Screening Test, Negative Confirmatory Test, and Positive Confirmatory Test at each time point.

Safety Population included all participants who received ≥1 administration of double-blind study treatment (N=155 in the Relamorelin 10 μg arm). Anti-relamorelin antibody testing was only done for those participants who received treatment with relamorelin. Number analyzed is the number of participants with data available at the given timepoint. Due to a laboratory issue not all positive screening tests were confirmed.