Semi recumbent position
When attached in a parallel fashion to the bed frame, the angle indicator dial used gravity to indicate the degree of backrest elevation on a protractor. All backrest measurements were recorded by using an angle indicator temporarily attached with magnets to the part of the bed frame that elevates. Nurses remained unaware of the measurement schedule and were not informed of the angle of backrest elevation once measured.
![semi recumbent position semi recumbent position](https://www.gosportsart.com/wp-content/uploads/2017/02/C521M_01-B.jpg)
Site investigators who were not directly responsible for positioning of patients recorded all measurements. Different measurement times were used each day in recognition of the possibility that different positions may be used at various times of the day and to prevent nurses from anticipating the time of observation and altering positioning accordingly. Measurement times were randomly selected from three 8-hour time blocks (8 am to 3:59 pm, 4 pm to 11:59 pm, and midnight to 7:59 am) for each 24-hour period to ensure that measurements were distributed across all nursing shifts.
![semi recumbent position semi recumbent position](https://fitnessabout.com/wp-content/uploads/2017/04/Recumbent-Bikes-vs-Semi-Recumbent-Bikes.jpg)
The predetermined, randomized measurement schedule was provided to each participating site. The degree of backrest elevation was measured 3 times per day for 7 consecutive days.