Volume 9, Number 2—February 2003
Research
Annual Mycobacterium tuberculosis Infection Risk and Interpretation of Clustering Statistics
Figure 4

Figure 4. Model predictions of A) the overall percentage of cases clustered during different time periods from 1993 to 1997 and B) the age-specific percentage of (male) cases clustered during the period 1993–1995 in the Netherlands and in settings in which the annual risk for infection has remained unchanged over time at 0.1%, 1%, and 3%. The clustering observed in the Netherlands, after excluding clusters involving immigrants, is also shown.