Sentence examples for valid days from inspiring English sources
"valid days" is correct and usable in written English
You can use it to refer to days when something is valid or acceptable. For example, "You can only exchange the item within 10 valid days of purchase."
Specifically, each monitor had to have at least 77 valid days, with a valid day defined as having at least nine hourly observations between 0800 and 1950 hr.
Counts (per minute) per day for valid days were recorded.
At least five valid days (including one weekend day) were required for inclusion in the analysis; a valid day was defined as a 24-hour period in which more than 600 minutes of wear time were recorded [ 31, 32].
We will calculate mean counts per minute by dividing the sum of total counts per epoch for a valid day by the number of minutes of wear time in that day across all valid days.
Participants with <3 valid days (including a weekend day) were excluded; this cut-off was based on previous research in British schoolchildren.
For the purposes of this study at least 3 valid days of data were required; a valid day constituted at least 12 h of wear time.
At least three valid days of data were required; a valid day constituted at least 10 h of wear time as assessed by the pedometer log.
26 Accelerometry-measured variables were converted to time (minutes) per valid day and daily ST time was calculated as the sum of the average ST minutes per valid day divided by the number of valid days.
Only days with ≥16 hours per day of wear, the "valid days," were included in this calculation.
The mean number of valid days (for those with at least 1 valid day) was 6 days.
To make weekday weekend comparisons, 3 valid days of accelerometer data, including 1 weekend day, were required, which reduced the sample size.
