Table 1

Algorithm definitions for type 1 diabetes, NHIS 2016–2017

AlgorithmQuestionnaire item
12345S6S7
Current insulin useXXXXXXInsulin can be taken by shot or pump. Are you NOW taking insulin?
Continuous insulin use beginning within 1 year of diagnosisXXXXXThinking back to when you were first diagnosed with diabetes, how long was it before you started taking insulin?
Since you started taking insulin, have you ever stopped taking it for more than 6 months?
Was this only during the first year after you were diagnosed with diabetes?
Diagnosed at age <30 yearsXXHow old were you when a doctor FIRST told you that you had diabetes or sugar diabetes?
Diagnosed at age <40 yearsXHow old were you when a doctor FIRST told you that you had diabetes or sugar diabetes?
Self-reported type 1 diabetesXXXWhat type of diabetes do you have?
No use of oral hypoglycemic medicationXAre you now taking diabetic pills to lower your blood sugar? These are sometimes called oral agents or oral hypoglycemic agents.
  • NHIS, National Health Interview Survey.