Diabetes technology

One-year real-world benefits of Tandem Control-IQ technology on glucose management and person-reported outcomes in adults with type 1 diabetes: a prospective observational cohort study

DiabetologiaPublished Prospective observational cohort study

Authors' conclusion

One-year use of Control-IQ was associated with better glucose management, improved diabetes-related quality of life, more treatment satisfaction, less severe hypoglycaemia and less work absenteeism in adults with type 1 diabetes.

Study context

Population
Adults with T1D starting Control-IQ (Dec 2021–Dec 2022), 13 Belgian diabetes centres; mean age 38.5 ± 13.1 years, 57.3% female
Participants
473 adults
Exposure
Control-IQ at start vs after 12 months
Outcome
Evolution of TIR (glucose 3.9-10.0 mmol/l)
Follow-up
12 months
Methodological detailsmulticentre, real-world, Data collected at start and after 4, 8 and 12 months, Data reported as mean ± SD or least-squares mean (95% CI)
  • Multicentre
  • Real-world
  • Data collected at start and after 4, 8 and 12 months
  • Data reported as mean ± SD or least-squares mean (95% CI)

Main finding

As reported in the abstract

TIR

P < 0.001

Observational data: associations, not effects.

Further findings

HbA1c · 12 months · decreased

P < 0.001

HbA1c % Start 7.4% [7.3, 7.5] · 12 months 6.7% [6.6, 6.8]

OutcomeStart12 monthsP value
Time <3.9 mmol/l · 12 monthsDecreased4.2% (CI 3.9–4.6)1.9% (CI 1.8–2.1)P < 0.001
Hypoglycaemia Fear Survey v2 worry · better scores
P < 0.001
Problem Areas in Diabetes - Short Form · better scores
P < 0.001
Diabetes Treatment Satisfaction Questionnaire status · better scores
P < 0.001
Work absenteeism days · decreased
P = 0.034

Hypoglycaemia Fear Survey v2 worry

Scores (22.5 [21.3, 23.7] vs 18.1 points [17.0, 19.3])

Problem Areas in Diabetes - Short Form

Scores (7.2 [6.7, 7.8] vs 6.1 points [5.5, 6.7])

Diabetes Treatment Satisfaction Questionnaire status

Scores (25.5 [24.8, 26.2] vs 31.0 points [30.4, 31.6])

Work absenteeism days

Days per 100 person-years (116.3 [42.8, 315.5] vs 69.3 [25.4, 189.2])

Safety

OutcomeP value
Self-reported severe hypoglycaemia events12 months vs Start · decreasedP = 0.002

Self-reported severe hypoglycaemia events

Events per 100 person-years (37.5 [21.3, 65.9] vs 15.7 [9.7, 25.3])

Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.

Original publication

One-year real-world benefits of Tandem Control-IQ technology on glucose management and person-reported outcomes in adults with type 1 diabetes: a prospective observational cohort study. Diabetologia. Published 11 February 2025. doi:10.1007/s00125-025-06366-x

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