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Field
Randomization Method
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Before
Randomization was done in an office using excel and imperfect latin squares. Over a 6 week period, we randomized offers of testing by clinic (3 sites), time of day (8am-12pm and 1-5pm) and day of week within study week and randomized the order of the week.
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After
Randomization was done in an office using excel and imperfect latin squares. Over a 5 week period, we randomized offers of testing by clinic (3 sites), time of day (8am-12pm and 1-5pm) and day of week within study week and randomized the order of the week.
After an initial 5 weeks, we extended the intervention period another 6 weeks, through the week of September 18, 2020. As before, we randomized offers of testing by clinic (3 sites), time of day (8am-12pm and 1-5pm) and day of week within study week and randomized the order of the week.
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