A Research Study to Compare Two Types of Insulin, a New Weekly Insulin, Insulin Icodec and an Available Daily Insulin, Insulin Glargine, Both in Combination With Mealtime Insulin, in People With Type 2 Diabetes Who Use Daily Insulin and Mealtime Insulin (ONWARDS 4)

Change in Fasting Plasma Glucose (FPG)

Change in FPG from baseline (week 0) to week 26 is presented. The outcome data was evaluated based on the in-trial observation period. In-trial observation period started at randomisation and ended at the date of the last direct participant-site contact, withdrawal for participants who withdrew their informed consent, the last participant-investigator contact as defined by the investigator for participants who were lost to follow-up (i.e., possibly an unscheduled phone visit) and death for participants who died before any of the above.

Time frame: Baseline (week 0), Week 26

Percentage of Time in Target-range 3.9-10.0 mmol/L (70-180 mg/dL) Using Continuous Glucose Monitoring (CGM) System

Percentage of time in target-range 3.9-10.0 mmol/L (70-180 milligrams per deciliter \[mg/dL\]) using continuous glucose monitoring (CGM) system from week 22 to week 26 is presented. Time in target range is defined as 100 times the number of recorded measurements in glycaemic target range 3.9-10.0 mmol/L (70-180 mg/dL), both inclusive, divided by the total number of recorded measurements. The outcome data was evaluated based on the in-trial observation period. In-trial observation period started at randomisation and ended at the date of the last direct participant-site contact, withdrawal for participants who withdrew their informed consent, the last participant-investigator contact as defined by the investigator for participants who were lost to follow-up (i.e., possibly an unscheduled phone visit) and death for participants who died before any of the above.

Time frame: From week 22 to week 26

Number of Severe Hypoglycaemic Episodes (Level 3)

Severe hypoglycaemic episodes (level 3) were defined as episodes that were associated with severe cognitive impairment requiring external assistance for recovery. The outcome data was evaluated based on the on-treatment observation period. The on-treatment observation period started at the date of first dose of trial product as recorded on the electronic case report form (eCRF), and ended at the first date of any of the following: The end of trial visit, the last date on trial product + 5 weeks for once daily insulin and + 6 weeks for once weekly insulin (corresponding to 5 weeks after the end of the dosing interval for both treatment arms) and the end-date for the in-trial observation period.

Time frame: From baseline (week 0) to week 31

Number of Clinically Significant Hypoglycaemic Episodes (Level 2) (<3.0 mmol/L (54 mg/dL) Confirmed by Blood Glucose (BG) Meter)

Clinically significant hypoglycaemic episodes (level 2) were defined as episodes that were sufficiently low to indicate serious, clinically important hypoglycaemia with plasma glucose value of less than (\<) 3.0 mmol/L (54 mg/dL). The outcome data was evaluated based on the on-treatment observation period. The on-treatment observation period started at the date of first dose of trial product as recorded on the electronic case report form (eCRF), and ended at the first date of any of the following: The end of trial visit, the last date on trial product + 5 weeks for once daily insulin and + 6 weeks for once weekly insulin (corresponding to 5 weeks after the end of the dosing interval for both treatment arms) and the end-date for the in-trial observation period.

Time frame: From baseline (week 0) to week 31

Number of Clinically Significant Hypoglycaemic Episodes (Level 2) (<3.0 mmol/L (54 mg/dL), Confirmed by BG Meter) or Severe Hypoglycaemic Episodes (Level 3)

Clinically significant hypoglycaemic episodes (level 2) were defined as episodes that were sufficiently low to indicate serious, clinically important hypoglycaemia with plasma glucose value of less than (\<) 3.0 mmol/L (54 mg/dL). Severe hypoglycaemic episodes (level 3) were defined as episodes that were associated with severe cognitive impairment requiring external assistance for recovery. The outcome data was evaluated based on the in-trial observation period. The on-treatment observation period started at the date of first dose of trial product as recorded on the electronic case report form (eCRF), and ended at the first date of any of the following: The end of trial visit, the last date on trial product + 5 weeks for once daily insulin and + 6 weeks for once weekly insulin (corresponding to 5 weeks after the end of the dosing interval for both treatment arms) and the end-date for the in-trial observation period.

Time frame: From baseline (week 0) to week 31

Percentage of Time Spent Below 3.0 mmol/L (54 mg/dL) Using Continuous Glucose Monitoring (CGM) System

Percentage of time spent less than (\<) 3.0 mmol/L (54 mg/dL) using CGM system from week 22 to week 26 is presented. The outcome data was evaluated based on the in-trial observation period. In-trial observation period started at randomisation and ended at the date of the last direct participant-site contact, withdrawal for participants who withdrew their informed consent, the last participant-investigator contact as defined by the investigator for participants who were lost to follow-up (i.e., possibly an unscheduled phone visit) and death for participants who died before any of the above.

Time frame: From week 22 to week 26

Percentage of Time Spent Above 10 mmol/L (180 mg/dL) Using Continuous Glucose Monitoring (CGM) System

Percentage of time spent \> 10 mmol/L (180 mg/dL) using CGM system from week 22 to week 26 is presented. The outcome data was evaluated based on the in-trial observation period. In-trial observation period started at randomisation and ended at the date of the last direct participant-site contact, withdrawal for participants who withdrew their informed consent, the last participant-investigator contact as defined by the investigator for participants who were lost to follow-up (i.e., possibly an unscheduled phone visit) and death for participants who died before any of the above.

Time frame: From week 22 to week 26

Mean Weekly Insulin Dose

Estimated mean weekly insulin dose during the last 2 weeks of treatment (from week 24 to week 26) is presented. The outcome data was evaluated based on the on-treatment observation period. The on-treatment observation period started at the date of first dose of trial product as recorded on the electronic case report form (eCRF), and ended at the first date of any of the following: The end of trial visit, the last date on trial product + 5 weeks for once daily insulin and + 6 weeks for once weekly insulin (corresponding to 5 weeks after the end of the dosing interval for both treatment arms) and the end-date for the in-trial observation period.

Time frame: From week 24 to week 26

Change in Body Weight

Change in body weight from baseline (week 0) to week 26 is presented. The outcome data was evaluated based on the in-trial observation period. In-trial observation period started at randomisation and ended at the date of the last direct participant-site contact, withdrawal for participants who withdrew their informed consent, the last participant-investigator contact as defined by the investigator for participants who were lost to follow-up (i.e., possibly an unscheduled phone visit) and death for participants who died before any of the above.

Time frame: Baseline (week 0), Week 26