The landscape map
Two markers at once. Colour is altitude: green is high ground (lower risk of death), brown is low ground. Where the colour changes fast, risk changes fast.
Point at the map to read a position.
Each map is a mortality surface fitted in NHANES with both markers together, adjusted for age and
sex. Grey areas are combinations too rare in the data to estimate. Altitude is relative to the map's reference
point. These are hazard shapes: they show where risk is high, not whether people are stable there. In the surface
view, drag the surface to turn it, or use the arrow keys; the two buttons return to a view from above or a tilt.
Stability on the terrain
Where the same people, followed for years, are actually held: stable points from ELSA placed on each marker's terrain. None of them falls on the two markers of these maps, so they are listed here and drawn on each marker's curve (follow the link). Three pass every check; two of them sit on a slope rather than in the trough, so being held somewhere is not the same as being held at the lowest risk (for haemoglobin in women, partly because the curve is fitted on both sexes and women's levels run lower).