Table 1.
Data availability in previous regular waves by cohort
| Years | Symptom assessment | Clinical diagnosis | |
|---|---|---|---|
| NESDA | |||
| 2-year follow-up | 2006–09 | QIDS, BAI, PSWQ, and DJGLS | CIDI |
| 4-year follow-up | 2008–11 | QIDS, BAI, and PSWQ | CIDI |
| 6-year follow-up | 2010–13 | QIDS, BAI, and PSWQ | CIDI |
| 9-year follow-up | 2014–16 | QIDS, BAI, and PSWQ | CIDI |
| NESDO | |||
| Baseline | 2006–10 | QIDS, BAI, and DJGLS | CIDI |
| 2-year follow-up | 2008–12 | QIDS and BAI | CIDI |
| 6-year follow-up | 2012–16 | QIDS and BAI | CIDI |
| NOCDA | |||
| 2-year follow-up | 2006–11 | BAI and DJGLS | SCID |
| 4-year follow-up | 2008–13 | BAI and DJGLS | SCID |
| 6-year follow-up | 2012–16 | BAI and DJGLS | SCID |
NESDA=Netherlands Study of Depression and Anxiety. NESDO=Netherlands Study of Depression in Older Persons. NOCDA=Netherlands Obsessive Compulsive Disorder Association Study. QIDS=16-item Quick Inventory of Depressive Symptoms. BAI=21-item Beck Anxiety Inventory. PSWQ=11-item Penn State Worry Questionnaire. DJGLS=six-item De Jong Gierveld Loneliness Scale. CIDI=Composite Interview Diagnostic Instrument. SCID=Structured Clinical Interview for DSM-IV axis I disorders.