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Table 3 Overview of estimates of participants needed and frequency of the measurements, with a certain CI

From: Assessing the precision of a time-sampling-based study among GPs: balancing sample size and measurement frequency

 

Measurements during the week per:

 

Half an hour

Hour

2 h

3 ha

CI of ± 1 h

45

100

200

300

CI of ± 2 h

15

30

75

100

CI of ± 3 h

< 10

15

30

50

  1. CI one-sided 95% confidence interval, hours above or below the mean
  2. aOne measurement per 3-h time slot was applied in our study
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