Skip to main content

Table 1 Hospital admissions with either clinical diagnosis or diagnosis of influenza (ICD-9487 and 488), 2009–2010 to 2014–2015 seasons

From: Inpatient hospital fatality related to coding (ICD-9-CM) of the influenza diagnosis in Spain (2009–2015)

Age group Years (y.) Number of admissions (%) Average annual incidence × 100,000 people (95% CI) Number of Deaths (%) Mortality rate ×  100,000 people (95% CI) Fatality (%)
(95% CI)
  487 488 All 487 488 All 487 488 All 487 488 All 487 488 All
<  5 y. 4543 18.5% 4059 14.3% 8602 16.3% 31.8 (30.8–32.7) 28.4 (27.5–29.2) 60.1 (58.86–61.4) 15 1.5% 27 1.7% 42 1.7% 0.1 (0.05–0.16) 0.19 (0.12–0.26) 0.29 (0.2–0.38) 0.3 (0.2–0.5) 0.7 (0.4–0.9) 0.5 (0.34–0.64)
5–14 y. 1461 6% 1525 5.4% 2986 5.6% 5.3 (5–5.5) 5.5 (5.2–5.8) 10.7 (10.34–11.11) 16 1.6% 15 1% 31 1.2% 0.06 (0.03–0.09) 0.05 (0.03–0.08) 0.11 (0.07–0.15) 1.1 (0.7–1.6) 1.0 (0.5–1.5) 1.0 (0.67–1.4)
15–44 y. 3658 14.9% 6985
24.6%
10,643 20.1% 3.1 (3–3.2) 6.0 (5.8–6.1) 9.1 (8.92–9.26) 58 5.9% 230 14.8% 288 11.3% 0.05 (0.04–0.06) 0.2 (0.17–0.22) 0.25 (0.22–0.27) 1.6 (1.2–2) 3.3 (2.9–3.7) 2.7 (2.4–3.01)
45–64 y. 4652 19% 7479
26.4%
12,131
22.9%
6.4 (6.2–6.5) 10.2 (10–10.5) 16.6 (16.29–16.88) 176 17.8% 480 30.9% 656 25.8% 0.24 (0.21–0.28) 0.66 (0.6–0.71) 0.9 (0.83–0.97) 3.8 (3.2–4.3) 6.4 (5.9–7) 5.4 (5.01–5.81)
Over 65 y. 10,213 41.6% 8309
29.3%
18,522
35%
20.6 (20.2–21) 16.8 (16.3–17.1) 37.3 (36.81–37.88) 725 73.2% 803 51.6% 1528 60% 1.46 (1.36–1.57) 1.62 (1.51–1.73) 3.08 (2.93–3.24) 7.1 (6.6–7.6) 9.7 (9–10.3) 8.6 (7.85–8.65)
Over 75 y. 6923 28.2% 5056
17.8%
11,979
22.7%
27.3 (26.6–27.9) 19.9 (19.4–20.5) 47.2 (46.33–48.02) 549 55.5% 527 33.9% 1076 42.3% 2.16 (1.98–2.34) 2.08 (1.9–2.25) 4.24 (3.98–4.49) 7.9 (7.3–8.6) 10.4 (9.6–11.3) 9.0 (8.47–9.49)
Over 85 y. 2492 10.2% 1587
5.6%
4079
7.7%
35.4 (34–36.8) 22.5 (21.4–23.7) 57.9 (56.16–59.71) 262 26.5% 193 12.4% 455 17.9% 3.72 (3.27–4.17) 2.74 (2.35–3.13) 6.46 (5.87–7.06) 10.5 (9.3–11.7) 12.2 (10.6–13.8) 11.2 (10.19–12.12)
Total 24,527 100% 28,357
100%
52,884
100%
8.7 (8.6–8.8) 10.1 (9.9–10.2) 18.8 (18.59–18.91) 990 100% 1555 100% 2545 100% 0.35 (0.33–0.37) 0.55 (0.52–0.58) 0.9 (0.87–0.94) 4.0 (3.8–4.3) 5.5 (5.2–5.8) 4.8 (4.63–4.99)