Figure 1. Total daily steps as a function of length of stay. Patients
were stratified according to number of complete 24-hour
(midnight to midnight) days spent in the hospital, including 1, 2,
3, 4, and 5 or more days. 47 patients spent at least five 24-hour
days, 34 at least six 24-hour days, and 28 at least seven 24-hour
days. Activity monitoring began at midnight on the day of admission
and ended at midnight of the day before discharge. Total
length of stay therefore is always 2 days longer than the number
of 24-hour days accumulated (e.g., 3 complete 24-hour days
corresponds to a 5-calendar-day length of stay; 1 complete 24-
hour day corresponds to a 3-day length of stay.