Table 2.

Overview of the Norwegian population surveys included

Survey	Years performed	Age range	Screening instrument used	Number of invitees	Number (%) with complete data
Tromsø6	2007-08	40–79 years of age	5 items from HSCL-10	11,899	10,991 (92.4%)
Tromsø7	2015-16	40–79 years of age	5 items from HSCL-10	21,082	19,423 (92.1%)
HUNT3	2006-08	20–79 years of age	7 items from HADS	41,184	37,560 (91.2%)
HUNT4	2017-19	20–79 years of age	7 items from HADS	42,053	38,560 (91.7%)

Abbreviations: HSCL: Hopkin’s Symptom Checklist; HADS: Hospital Anxiety and Depression Scale; HUNT: Health Survey of Nord-Trøndelag County