Steenbergen-Weijenburg, K.M. van

depression patient study diabetes health complication intervention score phq -9 treatment cost-effectiveness depressive disorder disorder type 2 diabetes outpatient result service research depressive diabetes patients van steenbergen-weijenburg point article clinic netherland sensitivity quality specificity follow-up review diabetes-related complications population group psychiatry table katon simon month outpatient clinics depression-free days signi ficantly effect value questionnaire test results patient health questionnaire intervention group screening depression-free symptom evaluation disease criteria management intervention costs healthcare author phq -9 score health services costs von korff m signi diabetes-related outcome 6 months method association outpatient clinic perspective variable analysis algorithm chec-list clouse re inclusion criteria control group outpatient costs screening instrument care patients curve neuropathy