Date of filling in this questionnaire or last update: 24/06/2020
1. IDENTIFICATION & BASIC DESCRIPTION
Cohort name
  Danish Working Hour Database (DWHD)
Country
 

  • Denmark

Name
  Anne Helene Garde
Institution
  National Research Centre for the Working Environment
Email
  ahg@nfa.dk
Upload files
 

Contact Principal Investigator (name)
  Anne Helene Garde
Data access policy (briefly describe)
  Data may be accessed for research purposes after application to the steering committee. Data is accessible at Statistics Denmark.
Participation in pooled analyses
 

  • The cohort is potentially interested in participating in pooled analyses of (European) occupational cohort studies (note pooled analyses also includes remote decentralized analyses that would not require any transfer of primary data as well as meta-analyses).

Main aim of cohort, please briefly describe the main objectives of the cohort
  Main aim is to study health and safety effects of working hours
Study design (please select as many as appropriate)
 

  • Prospective cohort

Source population (please select as many as appropriate)
 

  • Industry / occupation-based

Comparators (please select as many as appropriate)
 

  • Internal study population

Inclusion criteria
  All employees in the Danish regions including all employees in public hospitals.
Exclusion criteria
  None
Enrollment
  Completed
Age range at entry (main cohort)
 

Minimum Maximum Mean
18 80

Men at enrollment
  31 685
Women at enrollment
  120 395
Children (<18 years) at enrollment
  0
Participation rate at enrollment (if known)
  100
Comments
  Newly employed are included at each update.
2. OUTCOME FOLLOW-UP
Type of data for outcome follow-up (please select as many as appropriate)
 

  • Use of registers (specify)

Specify: Use of registers
 

  • All data may be linked to national registers including registers on hospital admissions and causes of death with diagnoses and prescription data on an individual level.

First follow-up period (provide year)
  2007
Last follow-up period (provide year)
  2018
Number of follow-ups after baseline (provide number)
  Continous
3. OCCUPATIONAL EXPOSURES
Source of exposure data collected (please select as many as appropriate)
 

  • Questionnaire, Personal (Self-reporting or interview)
  • Registry-based

Occupational history/time frame
  Follow-up period
Occupational coding performed
  Yes
Occupation (specify coding system used)
 

  • DISCO (based on ISCO)

Methods for exposure assessment (please select as many as appropriate)
 

  • Data modelling

Main categories
 

  • Organisation of work including working time

Organisation of work including working time | Employment conditions
 

  • Contract duration
  • Size of the workplace and company

Organisation of work including working time | Shift work
 

  • Night (permanent or rotating)
  • Rotating (not night)
  • Regular/variable

Organisation of work including working time | Working hours
 

  • Duration
  • Regular/variable

Comments
  Data includes daily information on starting and ending time of work
4. OUTCOMES EVALUATED
Baseline - type of outcome data collected (select more than one if applicable)
 

  • Registry-based

Registry-based
 

  • Cancer incidence
  • Disease specific clinical database
  • Employment status
  • Hospital discharge
  • Medication usage
  • Mortality register
  • Migration

Follow-up - type of outcome data collected (select more than one if applicable)
 

  • Registry-based

Registry-based
 

  • Cancer incidence
  • Disease specific clinical database
  • Employment status
  • Hospital discharge
  • Medication usage
  • Mortality register
  • Migration

Outcome type (please select as many as appropriate)
 

  • Mortality
  • Morbidity
  • Disability

Diagnostic groups based on ICD10
 

  • A Bacterial infectious disease, type of microorganisms*
  • B Viral infections, type of microorganisms*
  • B99 Other and unspecified infectious diseases, type of microorganisms*
  • C + D Neoplasms
  • D Diseases of blood and blood-forming organs excl. leukemia
  • E Endocrinological disease
  • E Malnutrition and obesity
  • E Metabolism disease
  • F Mental disorders
  • G Disease in the nervous system
  • H Disorders of the eye
  • H Disorders of the ear
  • I Heart disease
  • I Cerebrovascular diseases
  • J Respiratory disease
  • K Diseases of oral cavity, salivary glands and jaws
  • K Diseases of oesophagus, stomach, duodenum and appendix
  • K Hernia, colon and intestine disease
  • K Diseases of peritoneum, liver
  • L Skin, nail and hair disorders
  • M Arthritis, arthrosis, systemic connective disorders, spine disorders
  • M Disorders of muscles, bones, synovialis, bursa, cartilage
  • N Kidney, renal pelvis disease
  • N Male and female related disorders
  • O+P Pregnancy and labour
  • Q After birth – child disorders
  • S Injuries
  • Other (specify)

A Bacterial infectious disease, type of microorganisms*
 

  • Anasakis
  • Bartonella
  • Bordetella pertussis
  • Borrelia
  • Brucella
  • Campylobacter
  • Coxiella
  • Clostridium tetani
  • Clostridium difficile
  • Francisella tularensis
  • Helicobacter pylori
  • Legionella
  • Leishmania
  • Leptospira
  • Mycobacterium bovis
  • Mycobacterium tuberculosis
  • Neisseria gonorrhoeae
  • Neisseria meningitides
  • Pseudomonas aeruginosa
  • Rickettsia
  • Salmonella
  • Shigella
  • Staphylococcus
  • Streptococcus
  • Toxocara
  • Toxoplasma gondii
  • Trachomatis
  • Treponema pallidum
  • Trichomonas vaginalis
  • Other bacterial infections, please state

B Viral infections, type of microorganisms
 

  • Cytomegalovirus
  • Hantavirus
  • Hepatitis (A,B,C,E)
  • HIV virus
  • Human herpes virus
  • Human papilloma virus
  • Human T-lymphotrophic virus
  • Influenza virus
  • Measles virus
  • Monkey pox virus
  • Mumps virus
  • Parvovirus
  • Rhinovirus
  • Rubella virus
  • Tick-borne encephalitis virus
  • Varicella zoster virus
  • West Nile virus
  • SARS coronavirus
  • Other viral infections, please state

B99 Other and unspecified infectious diseases, type of microorganisms
 

  • Giardia lamblia
  • Chlamydia
  • Other infections, please state

C + D Neoplasms
 

  • Benign neoplasm
  • Carcinoma in situ
  • Leukemia
  • Malignant neoplasms gastro intes. system including liver, gall bladder, pancreas
  • Malignant neoplasm lung
  • Mesothelioma
  • Other malignant neoplasm of respiratory and intrathoracic organs, heart, pleura
  • Malignant neoplasm of bone and articular cartilage
  • Melanoma and other malignant neoplasms of skin
  • Neoplasms connective and soft tissue including nerves
  • Malignant neoplasm of breast
  • Malignant neoplasms, females gynecological
  • Malignant neoplasms of male genital organs
  • Malignant neoplasm of urinary tract and kidney
  • Malignant neoplasms of eye, brain and other parts of central nervous system
  • Malignant neoplasms of thyroid and other endocrine glands
  • Malignant neoplasms of ill-defined, secondary and unspecified sites
  • Malignant neoplasm without specification of site including excl. leukemia
  • Other, please state

D Diseases of blood and blood-forming organs excl. leukemia
 

  • Diseases of spleen
  • Polycythaemia vera
  • Myelodysplastic syndromes
  • Essential (haemorrhagic) thrombocythaemia
  • Other neoplasms of uncertain or unknown behaviour of lymphoid, haematopoietic and related tissue
  • Iron deficiency
  • Vitamin deficiency
  • Aplastic and other anemias
  • Acquired haemolytic anaemia
  • Enzyme disorders including Thalassaemia and Sickle-cell disorders
  • Other anaemias
  • Anaemia, unspecified
  • Coagulation defects
  • Purpura and other haemorrhagic conditions
  • Other diseases of blood and blood-forming organs
  • Immunodeficiency
  • Sarcoidosis
  • Other, please state

E Endocrinological disease
 

  • Thyroidea
  • Parathyroidea
  • Diabetes mellitus
  • Pituitary
  • Other endocrinological disease
  • Adrenogenital disorders
  • Testicular dysfunction
  • Other, please state

E Malnutrition and obesity
 

  • Vitamin A deficiency
  • Thiamine deficiency
  • Deficiency of other B group vitamins
  • Vitamin D deficiency
  • Deficiency of vitamin E
  • Deficiency of vitamin K
  • Vitamin deficiency, unspecified
  • Calcium deficiency
  • Deficiency of other nutrient elements
  • Other, please state

E Metabolism disease
 

  • Disorder of amino-acid metabolism, unspecified
  • Lactose intolerance
  • Disorders of sphingolipid metabolism and other lipid storage disorders
  • Disorders of glycosaminoglycan and glucoprotein metabolism metabolism
  • Disorders of lipoprotein metabolism and other lipidaemias
  • Hypercholesterolemia
  • Disorders of purine and pyrimidine metabolism
  • Disorders of porphyrin and bilirubin metabolism
  • Disorders of mineral metabolism
  • Cystic fibrosis
  • Other, please state

F Mental disorders
 

  • Dementia
  • Personality and behavioural disorders
  • Schizophrenia
  • Mood [affective] disorders
  • Depression
  • Eating disorders
  • Mental retardation
  • Disorders of psychological development including autism and Aspergers syndrome
  • Other mental disorder, not otherwise specified
  • Other, please state

G Disease in the nervous system
 

  • Infectious diseases of the central nervous system
  • Non-infectious encephalitis, myelitis and encephalomyelitis
  • Intracranial and intraspinal abscess and granuloma
  • Systemic atrophies primarily affecting the central nervous system including
  • Huntington's disease and Hereditary ataxia
  • Spinal muscular atrophy and related syndromes
  • Parkinson's disease
  • Dystonia
  • Alzheimer's disease
  • Other degenerative disorders of nervous system in diseases classified elsewhere
  • Multiple sclerosis
  • Epilepsy
  • Migraine
  • Sleep disorders
  • Facial nerve disorders
  • Disorders of other cranial nerves
  • Nerve root and plexus disorders
  • Carpal tunnel syndrome
  • Lesion of ulnar nerve
  • Lesion of radial nerve
  • Other mononeuropathies
  • Polyneuropathies and other disorders of the peripheral nervous system
  • Myasthenia gravis and other myoneural disorders
  • Muscular dystrophy
  • Muscular myopathy
  • Cerebral palsy and other paralytic syndromes
  • Toxic encephalopathy
  • Hydrocephalus
  • Other, please state

H Disorders of the eye
 

  • Disorders of eyelid
  • Xanthelasma of eyelid
  • Disorders of lachrymal system
  • Disorders of orbit
  • Conjunctivitis
  • Disorders of sclera
  • Disorders of cornea
  • Iridocyclitis
  • Senile cataract
  • Other cataract
  • Other disorders of lens
  • Retinal disorders
  • Glaucoma
  • Other disorders of vitreous body and globe in diseases classified elsewhere
  • Disorders of optic nerve and visual pathways
  • Disorders of ocular muscles, binocular movement, accommodation and refraction
  • Visual disturbances and blindness
  • Other, please state

H Disorders of the ear
 

  • Diseases of middle ear and mastoid
  • Diseases of inner ear
  • Other, please state

I Heart disease
 

  • Rheumatic heart disease, unspecified
  • Hypertensive diseases
  • Angina pectoris
  • Acute myocardial infarction
  • Atrial septal defect
  • Chronic ischaemic heart disease
  • Pulmonary embolism
  • Other pulmonary heart diseases
  • Nonrheumatic mitral valve disorders
  • Pulmonary valve disorders
  • Endocarditis
  • Myocarditis
  • Cardiomyopathy
  • Atrioventricular arrhythmia
  • Heart failure
  • Other, please state

I Cerebrovascular diseases
 

  • Subarachnoid haemorrhage
  • Intracerebral haemorrhage
  • Cerebral infarction
  • Stroke, not specified as haemorrhage or infarction
  • Atherosclerosis
  • Aneurysm and dissection
  • Raynaud's syndrome
  • Thromboangiitis obliterans [Buerger]
  • Arterial embolism and thrombosis
  • Phlebitis and thrombophlebitis
  • Haemorrhoids
  • Oesophageal varices
  • Varicose veins of other sites
  • Lymphadenitis
  • Hypotension
  • Other, please state

J Respiratory disease
 

  • Acute upper respiratory infections of multiple and unspecified sites
  • Influenza
  • Viral pneumonia
  • Bacterial pneumonia
  • Pneumonia due to other infectious organisms, not elsewhere classified
  • Abscess of lung and mediastinum
  • Pyothorax
  • Acute bronchitis
  • Acute bronchiolitis
  • Vasomotor and allergic rhinitis
  • Chronic rhinitis, nasopharyngitis and pharyngitis
  • Chronic sinusitis
  • Nasal polyp
  • Chronic diseases of tonsils and adenoids
  • Diseases of vocal cords and larynx, not elsewhere classified
  • Chronic Bronchitis
  • Emphysema
  • Chronic obstructive pulmonary disease (COPD)
  • Asthma
  • Byssinosis
  • Bronchiectasis
  • Pneumoconiosis
  • Hypersensitivity pneumonitis due to organic dust
  • Other interstitial lung disease
  • Adult respiratory distress syndrome
  • Pulmonary edema
  • Pneumothorax
  • Respiratory failure, not elsewhere classified
  • Other, please state

K Diseases of oral cavity, salivary glands and jaws
 

  • Dental caries
  • Gingivitis and periodontal diseases
  • Dentofacial anomalies [including malocclusion]
  • Stomatitis and related lesions
  • Diseases of tongue
  • Other, please state

K Diseases of oesophagus, stomach, duodenum and appendix
 

  • Oesophagitis
  • Gastro-oesophageal reflux disease
  • Other diseases of oesophagus
  • Gastric ulcer
  • Duodenal ulcer
  • Peptic ulcer, site unspecified
  • Gastrojejunal ulcer
  • Gastritis and duodenitis
  • Dyspepsia
  • Other, please state

K Hernia, colon and intestine disease
 

  • Hernia
  • Crohn's disease
  • Ulcerative colitis
  • Other non-infective gastro-enteritis and colitis
  • Vascular disorders of intestine
  • Paralytic ileus and intestinal obstruction without hernia
  • Diverticular disease of intestine
  • Irritable bowel syndrome
  • Fissure and fistula of anal and rectal regions
  • Abscess of anal and rectal regions
  • Intestinal malabsorption
  • Other, please state

K Diseases of peritoneum, liver
 

  • Peritonitis
  • Alcoholic liver disease
  • Toxic liver disease
  • Chronic hepatitis
  • Fibrosis and cirrhosis of liver
  • Cholelithiasis/Cholecystitis
  • Acute pancreatitis
  • Other, please state

L Skin, nail and hair disorders
 

  • Infections of the skin and subcutaneous tissue
  • Bullous disorders
  • Atopic dermatitis
  • Allergic contact dermatitis
  • Irritant contact dermatitis
  • Dermatitis due to substances taken internally
  • Pruritus
  • Psoriasis/Parapsoriasis
  • Urticaria
  • Erythema nodosum
  • Sunburn
  • Nail disorders
  • Alopecia areata
  • Hypertrichosis
  • Acne
  • Vitiligo
  • Other, please state

M Arthritis, arthrosis, systemic connective disorders, spine disorders
 

  • Bacterial arthritis
  • Reactive arthritis
  • Rheumatoid arthritis
  • Juvenile arthritis
  • Gout
  • Other arthritis
  • Polyarthrosis
  • Coxarthrosis
  • Gonarthrosis [arthrosis of knee]
  • Arthrosis of first carpometacarpal joint
  • Other arthrosis
  • Deformities of fingers and toes
  • Deformities of limbs
  • Deformities of spine including scoliosis
  • Disorders of patella
  • Internal derangement of knee
  • Pathological dislocation and subluxation of joint
  • Systemic lupus erythematosus
  • Systemic sclerosis
  • Polymyalgia rheumatic
  • Other systemic involvement of connective tissue
  • Spine disk disorders
  • Lumbago with sciatica
  • Low back pain
  • Other, please state

M Disorders of muscles, bones, synovialis, bursa, cartilage
 

  • Myositis
  • Calcification and ossification of muscle
  • Contracture of muscle
  • Chronic crepitant synovitis of hand and wrist
  • Bursitis of hand
  • Olecranon bursitis
  • Prepatellar bursitis
  • Other bursitis
  • Rotator cuff syndrome
  • Bicipital tendinitis
  • Calcific tendinitis of shoulder
  • Impingement syndrome of shoulder
  • Medial epicondylitis
  • Lateral epicondylitis
  • Other Synovitis and tenosynovitis
  • Osteoporosis
  • Osteomalacia
  • Skeletal fluorosis
  • Osteomyelitis - Osteonecrosis
  • Chondropathies
  • Other, please state

N Kidney, renal pelvis disease
 

  • Glomerular diseases
  • Renal tubulo-interstitial diseases
  • Obstructive and reflux uropathy
  • Nephropathy
  • Renal failure
  • Urolithiasis
  • Cystitis
  • Urethral stricture
  • Other, please state

N Male and female related disorders
 

  • Hyperplasia of prostate
  • Other disorders of prostate
  • Torsion of testis
  • Orchitis and epididymitis
  • Male infertility
  • Disorders of penis
  • Other disorders of male genital organs
  • Benign mammary dysplasia
  • Salpingitis and oophoritis
  • Inflammatory disease of uterus
  • Inflammatory disease of cervix uteri
  • Female pelvic inflammatory disease, unspecified
  • Inflammation of vagina and vulva
  • Endometriosis
  • Other disorders of female genital and reproductive organs
  • Abnormal menstrual cycle
  • Female infertility
  • In vitro fertilisation
  • Spontaneous abortion
  • Molar pregnancy
  • Elective abortion
  • Other, please state

O+P Pregnancy and labour
 

  • Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
  • Eclampsia in pregnancy, labour or puerperium
  • Excessive vomiting in pregnancy
  • Venous complications in pregnancy
  • Infections of genito-urinary tract in pregnancy
  • Diabetes mellitus in pregnancy
  • Malnutrition in pregnancy
  • Other specified pregnancy-related conditions
  • Complications of labour and delivery
  • Preterm delivery
  • Extremely low birth weight
  • Other low birth weight
  • Exceptionally large baby
  • Birth trauma
  • Congenital viral diseases
  • Foetal death of unspecified cause
  • Other, please state

Q After birth – child disorders
 

  • Congenital malformations of the nervous system incl. the brain
  • Congenital malformations of the circulatory system
  • Congenital malformations of the respiratory system
  • Cleft lip and cleft palate
  • Congenital malformations of digestive system
  • Congenital malformations of genital organs
  • Congenital malformations of the urinary system
  • Congenital malformations and deformations of the musculoskeletal system
  • Down's syndrome
  • Turner's syndrome
  • Klinefelter's syndrome
  • Other, please state

S Injuries
 

  • Injuries to the head
  • Injuries to the thorax
  • Injuries to the abdomen, lower back, lumbar spine and pelvis
  • Injuries to the shoulder, arm and fingers
  • Injuries to the hip and thigh
  • Injuries to the knee and lower leg, ankle and foot
  • Other, please state

Other health related outcomes
 

  • Sickness absence
  • Work participation

6. Other Information
 

  • Demographics
  • Education
  • Medical history
  • Socioeconomic status
  • Smoking

Possibility for linkage to data registries/data enrichment via data linkage
 

  • Cancer incidence
  • Employment status
  • Hospital discharge
  • Medication usage
  • Migration
  • Mortality register