. 2021 Nov 3;23(11):e31274. doi: 10.2196/31274

Table 2.

Study retention (number and percentage of patients who completed the questionnaires; completers) and dropout rates (no completion of the questionnaires), as well as adherence to the assigned therapy for both the follow-up measurement points T2 and T3, by equivalence study (n=167) and superiority study (n=133).

Time points			Equivalence study									Superiority study
			ONL1^a (n=79), n (%)		F2F^b (n=88), n (%)		χ²₂		P value		ONL2^c (n=70), n (%)		CAU^d (n=63), n (%)	χ²₂		P value
T2^e
	Adherent completers	30 (38)		26 (30)		8.87		.012		29 (41)			12 (19)	22.38	<.001
	Nonadherent completers	5 (6)		20 (23)						2 (3)			20 (32)
	Dropouts	44 (56)		42 (48)						39 (56)			31 (49)
T3^f
	Adherent completers	26 (33)		20 (23)		–^g		–^g		18 (26)			4 (6)	–^g	–^g
	Nonadherent completers	2 (3)		12 (14)						2 (3)			11 (18)
	Dropouts	51 (65)		56 (64)						50 (71)			48 (76)

^aONL1: online therapy in the equivalence study.

^bF2F: face-to-face therapy in the equivalence study.

^cONL2: online therapy in superiority study.

^dCAU: care as usual in the superiority study.

^eT2: 12-month follow-up measurement for the equivalence study; 9-month follow-up measurement for the superiority study.

^fT3: 18-month follow-up measurement for the equivalence study; 15-month follow-up measurement for the superiority study.

^gTest statistic could not be computed because the cell frequencies were too small.