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Table 1 Number of children with risk conditions among children hospitalized with influenza and in the general child population

From: Risk conditions in children hospitalized with influenza in Norway, 2017–2019

Risk group Proportion (number) of hospitalized influenza patients with risk condition Proportion (number) of children in the general population with risk condition
  2017–18 season 2018–19 season 2017–18 season
Population: 1129007
2018–19 season
Population: 1122508
Lung diseasea 12.1% (68/562) 13.5% (61/451) 3.4% (37,980/1129007) 3.3% (36,618/1122508)
Asthmab 6.1% (34/562) 4.9% (22/451) 2.2% (24,615/1129007) 2.1% (23,466/1122508)
Heart conditions 2.1% (12/562) 0.3% (3272/1129007) 0.3% (3295/1122508)
Immunocompromised 5.5% (31/562) 4.2% (19/451) 0.3% (3617/1129007) 0.3% (3630/1122508)
Neurological diseasec 7.5% (42/562) 5.3% (24/451) 0.8% (8967/1129007) 0.8% (8995/1122508)
Epilepsy 5.7% (32/562) 4.4% (20/451) 0.5% (5643/1129007) 0.5% (5664/1122508)
Diabetes Mellitus 1 0.3% (2980/1129007) 0.3% (3052/1122508)
Any risk conditiond 24.6% (138/562) 26.2% (118/451) 5.1% (57,237/1129007) 5.0% (56,125/1122508)
  1. aIncluding asthma diagnoses in primary care and other lung conditions from specialist care
  2. bAsthma diagnoses from primary care registry only
  3. cIncluding epilepsy
  4. dIncluding all diagnostic groups, also groups with numbers < 5 in individual groups