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Table 2 Percentage of influenza cases, in total and by those visiting each healthcare setting, stratified by age groups and presence of comorbidities, 2017/2018 season

From: Clinical and economic burden of physician-diagnosed influenza in adults during the 2017/2018 epidemic season in Spain

Segment

Sub-segment

Percentage of cases per segment (%)

Total

PC

OP

ED

HO

PM

Total (≥ 18)

18–49 years

60.5

60.5

35.1

41.8

12.2

53.9

50–64 years

26.3

26.3

31.9

23.6

21.5

28.9

 ≥ 65 years

13.3

13.2

33.0

34.6

66.3

17.2

Total (≥ 18)

With comorbidities

39.2

39.3

69.0

62.5

89.7

45.5

Without comorbidities

60.8

60.7

31.0

37.5

10.3

54.5

18–49 years

With comorbidities

28.2

28.3

48.4

39.0

61.8

32.3

Without comorbidities

71.8

71.7

51.6

61.0

38.2

67.7

50–64 years

With comorbidities

47.6

47.7

69.8

64.7

89.2

52.6

Without comorbidities

52.4

52.3

30.2

35.3

10.8

47.4

 ≥ 65 years

With comorbidities

73.0

72.8

90.3

89.3

95.0

74.7

Without comorbidities

27.0

27.2

9.7

10.7

5.0

25.3

With comorbidities

18–49 years

43.4

43.6

24.6

26.1

8.4

38.3

50–64 years

31.9

32.0

32.2

24.4

21.4

33.4

 ≥ 65 years

24.7

24.4

43.2

49.5

70.2

28.3

Without comorbidities

18–49 years

71.5

71.4

58.5

68.0

45.3

66.9

50–64 years

22.6

22.7

31.1

22.2

22.6

25.1

 ≥ 65 years

5.9

5.9

10.4

9.9

32.1

8.0

  1. ED Emergency Department, HO Hospital (Inpatient), OP Outpatient (specialized care), PC Primary Care, PM Prescription Medicines