As it happens, progress in improving health for the total population as measured by expected length of life at birth proceeded at not far from the same rate before World War II and after World War II.

FORBES: How To Solve The Health Care Crisis

The neat thing about this prediction was the way it seemed to fit the number of good friends most people have, as measured by the length of address books, the size of hunter-gatherer bands, the population of neolithic villages and the strength of army units.

WSJ: The Social Network and the Dunbar Number | Mind & Matter

In both cases men (who are hairier than women, as measured by the density of follicles and the length of the vellus hair) were better off than women when the bugs were released on unshaven patches of skin, though there was no significant difference between the sexes when they were shaved.

ECONOMIST: Body hair

During the swims, the researchers measured the volunteers' oxygen consumption, rectal temperature, swim speed and angle, and stroke rate and length.

BBC: Cold water increases drowning risk