Fig. 3. 3a. Calcium Intake and RCSD Consumption, Males 12–19 y. Sunflower density plots of RCSD consumption and calcium intake among adolescent males. 3b. Calcium Intake and Milk Consumption, Males 12–19 y. Sunflower density plots of milk consumption and calcium intake among adolescent males. 3c. Calcium Intake and RCSD Consumption, Females 12–19 y. Sunflower density plots of RCSD consumption and calcium intake among adolescent females. 3d. Calcium Intake and Milk Consumption, Females 12–19 y. Sunflower density plots of milk consumption and calcium intake among adolescent females. Density-distribution sunflower plots with linear fit regression line, and 95% confidence interval of calcium intake (mg/d) predictions for RCSD and milk consumption (g/day) using the 24-hour dietary recall from NHANES 1999–2002. A single observation is represented by a single point. Multiple observations at the same point on the graph are represented as either a light or dark "flower" with "petals." Light flowers have a clear background, and dark flowers have a gray background. Dark patches with many petals indicate areas of the plot where observations are extremely prevalent or densely clustered. The long-dashed line represents the linear regression (weighted) of RCSD or milk consumption on calcium intake, and the pair of short-dashed lines above and below the regression line represents the 95% confidence interval of the calcium intake prediction.