Table 1.
Metropolitan region population, TF cases, and incidence rates by year
| Year | Cases | Population | IR × 105 | Intervention 1 | Intervention 2 | Unemployment % |
|---|---|---|---|---|---|---|
| 1969 | 3,463 | 3,381,181 | 102.42 | 0 | 0 | 6.15 |
| 1970 | 3,408 | 3,478,667 | 97.97 | 0 | 0 | 7.13 |
| 1971 | 3,007 | 3,553,922 | 84.61 | 0 | 0 | 5.50 |
| 1972 | 2,640 | 3,629,177 | 72.74 | 0 | 0 | 3.78 |
| 1973 | 1,865 | 3,704,432 | 50.35 | 0 | 0 | 4.63 |
| 1974 | 2,424 | 3,779,687 | 64.13 | 0 | 0 | 9.65 |
| 1975 | 3,500 | 3,854,943 | 90.79 | 0 | 0 | 16.18 |
| 1976 | 3,545 | 3,927,154 | 90.27 | 0 | 0 | 16.78 |
| 1977 | 7,070 | 3,999,366 | 176.78 | 0 | 0 | 13.23 |
| 1978 | 8,334 | 4,071,578 | 204.69 | 0 | 0 | 14.00 |
| 1979 | 6,358 | 4,143,789 | 153.43 | 0 | 0 | 13.55 |
| 1980 | 6,827 | 4,216,001 | 161.93 | 0 | 0 | 11.75 |
| 1981 | 6,936 | 4,301,778 | 161.24 | 0 | 0 | 11.08 |
| 1982 | 7,954 | 4,387,555 | 181.29 | 0 | 0 | 22.10 |
| 1983 | 9,825 | 4,473,332 | 219.63 | 0 | 0 | 22.23 |
| 1984 | 5,819 | 4,559,109 | 127.63 | 1 | 0 | 19.23 |
| 1985 | 3,848 | 4,644,886 | 82.84 | 1 | 0 | 16.35 |
| 1986 | 3,780 | 4,749,844 | 79.58 | 1 | 0 | 13.50 |
| 1987 | 2,675 | 4,854,803 | 55.10 | 1 | 0 | 12.25 |
| 1988 | 2,774 | 4,959,761 | 55.93 | 1 | 0 | 10.98 |
| 1989 | 3,938 | 5,064,719 | 77.75 | 1 | 0 | 9.13 |
| 1990 | 2,428 | 5,169,678 | 46.97 | 1 | 0 | 9.55 |
| 1991 | 2,690 | 5,271,098 | 51.03 | 1 | 0 | 7.43 |
| 1992 | 447 | 5,372,519 | 8.32 | 1 | 1 | 6.00 |
| 1993 | 364 | 5,473,940 | 6.65 | 1 | 1 | 6.28 |
| 1994 | 361 | 5,575,360 | 6.47 | 1 | 1 | 6.78 |
| 1995 | 389 | 5,676,781 | 6.85 | 1 | 1 | 6.63 |
| 1996 | 302 | 5,769,478 | 5.23 | 1 | 1 | 6.23 |
| 1997 | 273 | 5,862,175 | 4.66 | 1 | 1 | 6.63 |
| 1998 | 231 | 5,954,872 | 3.88 | 1 | 1 | 9.60 |
| 1999 | 207 | 6,047,569 | 3.42 | 1 | 1 | 9.70 |
| 2000 | 259 | 6,140,266 | 4.22 | 1 | 1 | 9.80 |
| 2001 | 201 | 6,212,770 | 3.24 | 1 | 1 | NA |
| 2002 | 212 | 6,285,273 | 3.37 | 1 | 1 | NA |
| 2003 | 146 | 6,356,534 | 2.30 | 1 | 1 | 9.30 |
| 2004 | 133 | 6,425,332 | 2.07 | 1 | 1 | NA |
| 2005 | 100 | 6,494,536 | 1.54 | 1 | 1 | NA |
| 2006 | 80 | 6,565,792 | 1.22 | 1 | 1 | 7.00 |
| 2007 | 63 | 6,640,697 | 0.95 | 1 | 1 | NA |
| 2008 | 54 | 6,720,663 | 0.80 | 1 | 1 | NA |
| 2009 | 35 | 6,804,444 | 0.51 | 1 | 1 | 10.10 |
| 2010 | 70 | 6,887,859 | 1.02 | 1 | 1 | NA |
| 2011 | 82 | 6,971,899 | 1.18 | 1 | 1 | NA |
| 2012 | 65 | 7,057,491 | 0.92 | 1 | 1 | NA |
IR = incidence rate; NA = data not available; TF = typhoid fever. Metropolitan region of Chile, 1969–2012. The presence of the intervention is marked as 1 and its absence as 0. Unemployment was included as the variable which better explained the raise of TF in the 1970s.