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Historical cholera rates (cases per 1,000 population): Correlation among years prior to the study
| Mean | 1997 | 1998 | 1999 | |
|---|---|---|---|---|
| 1997 | 3.54 | – | – | – |
| 1998 | 3.93 | 0.142 | – | – |
| 1999 | 1.67 | 0.052 | 0.002 | – |
Data were taken from 65 villages. Means and correlations are weighted with village population numbers serving as weights. All three reported correlations are insignificant (P > 0.25).
