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. 2021 Apr 30;5(4):e25541. doi: 10.2196/25541

Table 3.

Clinic visit attendance among smoking cessation clinical trial participants by last in-person visit for the pre–COVID-19 cohort (n=51).

Matching in-person visita n On-site clinic visit completion, n (%)b On-site visit attendance (%)


Visit #2 Visit #3 Visit #4 Visit #5 Visit #6
Visit #1 11 11 (100) 11 (10) 10 (91) 10 (91) 8 (73) 91
Visit #2 9 N/Ac 7 (78) 7 (78) 7 (78) 7 (78) 78
Visit #3 14 N/A N/A 14 (100) 14 (100) 13 (93) 98
Visit #4 7 N/A N/A N/A 6 (86) 6 (86) 86
Visit #5 10 N/A N/A N/A N/A 10 (100) 100
Total 51 11 (100) 18 (90) 31 (91) 37 (93) 44 (86) 89.8d

aMatching: on-site visit during a similar period in 2018 and 2019.

bPercentages in the Total row are calculated based on the sum of visits in each column.

cN/A: not applicable.

d95% CI 84.0%-94.1%.