Table 2.
Number and Age Distribution of Excess Deaths and Years of Life Lost Associated With Each Wave of the A/H1N1 Influenza Pandemic, 2009–2010, and Past Epidemic Seasons, 2000–2008, Mexico
| Excess all-cause excess deaths |
Years of life lost |
|||
| No. (95% CI) | Percentage in persons <60 years | No. in thousands (95% CI) | Percentage in persons <60 years | |
| A/H1N1 pandemic | ||||
| Spring 2009a | 2300 (700–3900) | 78 | 95.1 (53.3–199.7) | 91 |
| Summer 2009a | 1800 (200–3300) | 71 | 71.4 (29.0–128.2) | 93 |
| Fall 2009a | 7900 (4600–11 300) | 68 | 278.1 (190.0–366.2) | 87 |
| Winter 2010a,b | 14 300 (10 700–18 000) | 14 | 203.3 (112.4–294.2) | 36 |
| Total April 2009–April 2010 | 26 500 (21 000–31 900) | 40 | 649.5 (509.7–789.4) | 72 |
| 2003–2004 A/H3N2 epidemic | 31 100 (28 200–34 000) | 28 | 668.5 (598.1–739.0) | 62 |
| Seasonal epidemicsc | 19 200 (16 300–22 100) | 30 | 426.4 (356.1–496.8) | 63 |
Abbreviation: CI, confidence interval. Years of life lost are derived from all-cause excess mortality rates. Excess deaths and years of life lost have been rounded to the nearest hundredth.
a
Spring 2009: April–May 2009; summer 2009: June–July 2009; fall 2009: August–December 2009; winter 2010: January–April 2010.
b
Period when pandemic A/H1N1 influenza virus and respiratory syncytial virus cocirculated.
c
Average of 8 interpandemic seasons 2000–2001 through 2007–2008.