vital statistic

A single important number derived from public health data or personal measurements.

Japanese Meaning

公衆衛生データや個人の計測値から得られる、重要な統計数値 / 主要な統計量

The vaccination rate became the most important vital statistic public health officials monitored during the outbreak.

ワクチン接種率は、流行の間に公衆衛生当局が監視した最も重要な数値になった。

Sense（1）

A single important number derived from public health data or personal measurements.

Except for the fact that the "matter" of which he was now a vital statistic was simply unbearable to him. His death would come as a shock to him […]

vital statistics

（ plural ）