Table 3 Estimated Influenza-Associated Excess Hospitalizations for All Ages and for Population Aged 65 Years Old or Over, in Absolute Number of Cases and per 100,000 People, by Group of Diagnoses and Epidemic Season in Spanish Public Hospitals Between 2008/2009 and 2017/2018

P&I

All agess

N

4,859

14,616

12,286

11,777

6,191

15,294

19,874

15,785

24,188

37,821

Rate^a

10.6

31.5

26.4

25.2

13.2

32.8

42.8

34.0

52.0

81.2

95% CI

7.6–13.8

29.1–33.6

23.6–29.3

22.5–28.1

10.4–16.1

30.4–35

40–44.7

31–36.8

49.6–54.6

78–83.6

 ≥ 65

N

3,703

1,426

4,438

9,147

3,033

7,730

14,061

6,344

19,361

27,274

Rate^a

48.8

18.4

56.2

113.6

37.0

92.5

165.1

73.4

221.1

306.8

95% CI

37.2–60.2

9–27.8

45.8–66.6

103–123.6

26.5–48.4

83.4–100.5

154.6–172.2

62.3–83.7

212.4–230.3

295.5–314.6

R

All ages

N

9,069

16,518

23,410

32,885

13,764

26,384

39,304

20,115

36,407

64,390

Rate^a

19.7

35.6

50.3

70.4

29.4

56.6

84.6

43.3

78.3

138.2

95% CI

11.3–27.8

29.5–41.8

42.6–57.3

63.3–77.6

22.4–36.3

50.4–62.1

77.9–90.5

35.4–50.6

71–85.2

129.5–145.7

 ≥ 65

N

11,690

1808

11,149

29,812

11,025

15,541

30,959

7,956

33,124

52,781

Rate^a

154.1

23.4

141.2

370.1

134.5

186.1

363.4

92.1

378.2

593.7

95% CI

121.9–184.7

− 0.5 to 48.8

113.7–167.7

343.6–397.7

107.2–160.4

163–208.5

337.6–384.4

63.7–121.5

351.7–403.9

561.4–619.4

C&R

All ages

N

16,546

12,844

30,444

41,665

16,743

29,924

49,761

30,430

45,672

52,861

Rate^a

36.0

27.7

65.4

89.1

35.8

64.2

107.1

65.5

98.3

113.5

95% CI

23.1–47.9

17.7–37.2

53.7–77

77.2–100.7

24.4–47.1

53.8–73.7

96.7–116.9

52.9–78

86.7–109.6

101.3–126

 ≥ 65

N

18,438

− ^b

15,963

40,098

12,559

18,382

40,351

16,479

42,722

48,824

Rate^a

243.1

− ^b

202.2

497.8

153.2

220.1

473.7

190.7

487.8

549.2

95% CI

196.3–288.3

− 55.9 to 18.2

156.7–245.5

454.1–541.9

110.7–195.1

183.3–256

435.9–511.7

146.1–236.8

449.5–528.6

505.9–593.4

All-cause

All ages

N

–^b

3,029

36,546

34,244

960

35,560

35,464

53,181

32,775

48,313

Rate^a

–^b

6.5

78.5

73.3

2.1

76.3

76.3

114.5

70.5

103.7

95% CI

− 46 to 31.2

− 21.5 to 36.2

42.8–109.9

35.7–110.4

− 31.3 to 34.9

44.9–107.2

48.2–108.2

80.3–150.5

38.6–103

68.3–142.4

 ≥ 65

N

6,862

–^b

13,759

39,696

8,980

18,970

35,989

24,477

38,290

48,898

Rate^a

90.5

–^b

174.2

492.8

109.6

227.1

422.5

283.2

437.2

550.0

95% CI

− 10.2 to 180.8

− 111.4 to 32.1

85.7–254.9

404.3–583.5

25.4–190.9

143.4–300.7

350.1–500.1

196.8–373.2

352.2–513.7

465.8–641.7