Annex Table 4.

Indicators

Category I: Primary data

OUTCOME TYPE A: INDICATORS OF POSITIVE MENTAL HEALTH
Study type	Indicator	Inventory	Data source/Study	Publication
Construct: Satisfaction of life
A	Satisfaction of life	Short scale L-1 (Scale 0–10)	SOEP	[1–7]
B	Satisfaction of life	Single item (Scale 1–7)	COSMO	[8]
C	Satisfaction of life	Short scale L-1 (Scale 0–10)	Corona COMPASS	[9]
E	Satisfaction of life	Single item (1 to 7)	Longitudinal study of people in full-time employment	[10]
F	Satisfaction of life	Four items of the Temporal Satisfaction with Life Scale	Online survey of the universities Marburg and Giessen	[11]
F	Satisfaction of life	Brief Multidimensional Life Satisfaction Scale	Online survey of the universities Witten/Herdecke, …	[12]
Construct: Wellbeing
A	Wellbeing	Four single items (Scale 1–5): Positive and negative affect	SOEP	[1, 2, 4–7]
A	Wellbeing	WHO-5-Well-Being-Index	Study of the Central Institute of Mental Health Mannheim	[13]
E	Wellbeing	Items of the Positive and Negative Affect Schedule (Short Form)	Longitudinal study of people in full-time employment	[10]
F	Wellbeing	WHO-5	Online survey of the Medizinische Hochschule Hannover	[14]
F	Wellbeing	WHO-5-Well-Being-Index	Online survey of the universities Witten/Herdecke, …	[12]
Construct: Resilience
B	Resilience	Brief-Resilience-Scale (BRS)	COSMO	[15, 16]
3 Constructs			8 Data sources/Studies	[1–16]

OUTCOME TYPE B: INDICATORS OF MENTAL BURDEN
Study type	Indicator	Inventory	Study	Publication
Construct: Feelings of anxiety, dejection
A	Anxiety	State-Trait Anxiety Inventory short scale until week 4: Five items (M; cut-off >2) from week 5: Two items	The Mannheim Corona Study	[17–19]
B	Mental distress (anxiety, dejection)	Five single items from GAD-7, ADS, IES-R (M)	COSMO	[8, 15]
F	Anxiety, depression	State-Trait-Anxiety-Depression-Inventory (STADI)	Online survey of the universities Marburg and Giessen	[11]
Construct: COVID-19-related anxiety and distress
E	COVID-19 specific anxiety	C-19-A	CORA Longitudinal study	[20]
F	COVID-19 related anxiety	Single item (Scale 1–7)	Online survey of the LVR-Clinic Essen	[21, 22]
F	COVID-19 related stress	COVID-19 Peritraumatic Distress Index (CPDI)	Online survey by Charité	[23]
Construct: Situational burden and psychosocial stress
A	Psychosocial distress	PHQ-D Stress Module (Total)	Study of the Central Institute of Mental Health Mannheim	[13]
B	Situational stress	Single item	COSMO	[8]
B	Mental distress	Single item	German Depression Barometer	[24, 25]
C	Stress experience	Parental Stress Scale (Total)	Parent study of the Berlin University Alliance	[26, 27] Erratum
D	Psychosocial distress	PHQ-D stress module (Total); mean difference at t1	NAKO	[28]
E	Everyday burdens per week	Amount	LORA	[29, 30]
F	Psychosocial distress	PHQ-D Stress Module	Online survey of the Medizinische Hochschule Hannover	[14]
F	Mental distress	Distress Thermometer (Cut-Off >3)	Online survey of the LVR-Clinic Essen	[22, 31–33]
3 Constructs			13 Data sources/Studies

OUTCOME TYPE C: INDICATORS OF ACUTE SYMPTOMS OF MENTAL DISORDER
Study type	Indicator	Inventory	Study	Publication
General psychopathological symptoms
A	Psychopathological symptoms	Brief Symptom Inventory (BSI-18)	Study of Ulm University	[34]
A	Symptoms and syndrome diagnosis: depressive disorder, anxiety disorder, somatic disorder; psychosocial distress comorbidity syndrome diagnosis	Screening-based syndrome diagnoses from PHQ-D total values of the respective symptomatology	Study of the Central Institute of Mental Health Mannheim	[13]
C	Psychopathological symptoms	Brief Symptom Inventory (BSI-18)	Study of the elderly population aged 65 and over by the University Leipzig	[35]
E	Mental symptoms	GHQ-28 median value	LORA	[29, 30]
E	Psychopathological symptoms	Mini-Symptom Checklist	Longitudinal study of Saarland University	[36]
F	Symptoms ‘Any mental disorder’	Beck-Depression-Inventory, GAD-7, PHQ-Panic Module, Obsessive-Compulsive Inventory-Revised	Initial sample of a longitudinal study of the Justus Liebig University Giessen	[37]
Depressive and anxiety symptoms
A	Depressive and anxiety symptoms	PHQ-4 (M)	SOEP	[1, 2, 4, 6, 7, 38]
A	Depressive and anxiety symptoms	PHQ-4 (M)	Study of the universities Mainz and Leipzig	[39]
C	Depressive and anxiety symptoms	PHQ-4 (M)	Parent study of the Berlin University Alliance	[26, 27] Erratum
E	Depressive and anxiety symptoms	PHQ-4 (Cut-Off >5); M	CORA Longitudinal study	[20]
F	Depressive and anxiety symptoms	PHQ-4; (M)	Online survey of the Medizinische Hochschule Hannover	[14]
F	Depressive and anxiety symptoms	PHQ-4; (M)	CORA initial sample in the cross-section	[40]
Depressive symptoms
A	Depressive symptoms	PHQ-8 (>9)	GEDA-EHIS	[41, 42]
A	Depressive symptoms	Individual symptoms PHQ-8 over time	GEDA-EHIS	[41, 42]
A	Depressive symptoms	from week 5 PHQ-2	The Mannheim Corona Study	[18]
D	Depressive symptoms	PHQ-9 (Cut-Off: >9 total; median difference)	NAKO	[28, 43]
E	Depressive symptoms	PHQ-2 (Cut-Off >2)	CORA Longitudinal study	[20]
F	Depressive symptoms	PHQ-2 (Cut-Off >2)	Online survey of the LVR-Clinic Essen	[22, 31–33]
F	Depressive symptoms	PHQ-9 (>9, at least moderate Symptomatology)	Initial sample of a longitudinal study of the University Tübingen	[44]
F	Depressive symptoms	Beck-Depression-Inventory	Initial sample of a longitudinal study of the Justus Liebig University Giessen	[37]
F	Depressive symptoms	ICD-10-Symptom-Rating (ISR)	Online survey of the universities Göttingen and Regensburg	[45]
Symptoms of anxiety disorder
D	Symptoms of generalised anxiety disorder	GAD-7 (Cut-Off: >9, total; median difference to t1)	NAKO	[28, 43]
E	Symptoms of generalised anxiety disorder	GAD-2 (Cut-Off >2)	CORA Longitudinal study	[20]
F	Symptoms of generalised anxiety disorder	GAD-7 (Cut-Off >9, at least moderate Symptomatology)	Online survey of the LVR-Clinic Essen	[21, 22, 32, 33]
F	Symptoms of generalised anxiety disorder	GAD-2 (Cut-Off >2)	Online survey of the LVR-Clinic Essen	[31]
F	Symptoms of panic disorder	PHQ Panic Module Long Version	Initial sample of a longitudinal study of the University Tübingen	[44]
F	Symptoms of generalised anxiety disorder	GAD-7 (>9, at least moderate symptoms)	Initial sample of a longitudinal study of the University Tübingen	[44]
F	Symptoms of generalised anxiety disorder	GAD-7	Initial sample of a longitudinal study of the Justus Liebig University Giessen	[37]
F	Symptoms of panic disorder	PHQ-Panic module	Initial sample of a longitudinal study of the Justus Liebig University Giessen	[37]
Symptoms of obsessive compulsive disorder
F	Symptoms of obsessive compulsive disorder	Obsessive-Compulsive Inventory-Revised	Initial sample of a longitudinal study of the Justus Liebig University Giessen	[37]
5 Constructs			18 Data sources/Studies