Table 3.

δ-based sensitivity analysis.

Time and analysisa		Compared to e-book				Compared to Xiaoai
		Group difference, value (SE)	95% CI	P value	Group difference, value (SE)		95% CI	P value
T1 (after 1 week)
	MIb, MARc	−1.52 (0.43)	−2.38 to −0.66	.001	−2.62 (0.42)		−3.45 to −1.78	<.001
	δ=−0.31	−1.45 (0.43)	−2.31 to −0.59	.001	−2.52 (0.42)		−3.36 to −1.69	<.001
	δ=−0.62	−1.38 (0.44)	−2.25 to −0.51	.002	−2.43 (0.43)		−3.27 to −1.58	<.001
	δ=−0.93	−1.31 (0.44)	−2.19 to −0.43	.004	−2.33 (0.43)		−3.18 to −1.48	<.001
	δ=−1.24	−1.24 (0.45)	−2.13 to −0.35	.007	−2.24 (0.44)		−3.10 to −1.37	<.001
T2 (after 1 month)
	MI, MAR	−1.11 (0.54)	−2.18 to −0.03	.043	−1.65 (0.55)		−2.74 to −0.56	.003
	δ=−0.32	−1.03 (0.54)	−2.11 to 0.04	.06	−1.55 (0.55)		−2.64 to −0.46	.006
	δ=−0.64	−0.96 (0.55)	−2.05 to 0.12	.08	−1.45 (0.55)		−2.55 to −0.35	.01
	δ=−0.96	−0.89 (0.55)	−1.98 to 0.20	.11	−1.35 (0.56)		−2.46 to −0.24	.02
	δ=−1.28	−0.81 (0.56)	−1.92 to 0.29	.15	−1.25 (0.56)		−2.37 to −0.13	.03

^aThe absolute mean change from baseline to postintervention in the PHQ-9 score of all participants was −1.24, and the absolute mean change from baseline to follow-up in the PHQ-9 score of all participants was −1.28.

^bMI: multiple imputation.

^cMAR: missing at random.