An Ecological Study of Tuberculosis Transmission in California
Ward P. Myers, MD, MPH,
Janice L. Westenhouse, MPH,
Jennifer Flood, MD, MPH and
Lee W. Riley, MD
Ward P. Myers is with the Childrens Hospital, Boston, and Boston Medical Center, Boston, Mass. Janice L. Westenhouse and Jennifer Flood are with the Tuberculosis Control Branch, California Department of Health Services, Berkeley, Calif. Lee W. Riley is with the University of California, Berkeley, School of Public Health.
FIGURE 1—Regional differences in incidence rate ratios for pediatric tuberculosis and ecologic variables, by race/ethnicity (a) and sociodemographic variables (b).
Note. Incidence rate ratios reflect the change in the incidence rate that occurs when the area-based measure increases by 1 standard deviation. Standardized values for median income are inverted. Incidence rate ratio shows change for a 1-standard-deviation decrease in median income.