Volume 15, Number 12—December 2009
Research
Possible Interruption of Malaria Transmission, Highland Kenya, 2007–2008
Table 2
Year | Kipsamoite |
Kapsisiywa |
|||||
---|---|---|---|---|---|---|---|
Cumulative incidence | Incidence ratio (95% CI) | p value | Cumulative incidence | Incidence ratio (95% CI)† | p value | ||
2003 Apr–2004 Mar | 23.20 | Ref | Ref | 106.03 | Ref | Ref | |
2004 Apr–2005 Mar | 42.53 | 1.83 (1.36–2.47) | <0.001 | 82.58 | 0.78 (0.66–0.91) | 0.002 | |
2005 Apr–2006 Mar | 18.79‡ | 0.81 (0.57–1.16)§ | 0.229 | 8.03¶ | 0.10 (0.07–0.15)# | <0.001 | |
2006 Apr–2007 Mar | 9.30** | 0.47 (0.30–0.71)†† | <0.001 | 8.99‡‡ | 0.19 (0.12–0.27)§§ | <0.001 | |
2007 Apr–2008 Mar | 0.00 | 0.00 | <0.001 | 0.00 | 0.00 | <0.001 |
*CI, confidence interval; Ref, reference.
†Annual cumulative incidence/1,000 persons was compared by using negative binomial regression, except for 2007–2008, which was compared by using Fisher exact test.
‡Available data were for all months except January 2006.
§Compared with same months in 2003–2004 (incidence 23.20/1,000).
¶Available data were for April–June 2005 and February 2006.
#Compared with same months in 2003–2004 (incidence 79.41/1,000).
**Available data were for April–June 2006 and December 2006–March 2007.
††Compared with same months in 2003–2004 (incidence 19.99/1,000).
‡‡Available data were for April–May 2006 and December 2006–March 2007.
§§Compared with same months in 2003–2004 (incidence 48.19/1,000).
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