. Author manuscript; available in PMC: 2024 Feb 1.

Published in final edited form as: J Subst Use Addict Treat. 2023 Jan 6;145:208930. doi: 10.1016/j.josat.2022.208930

Table 2a.

Engagement with text message (SMS) intervention by early vs. late assessment, (N=33)

	Early 4-week assessment group (N=16)	Late 8-week assessment group (N=17)	p ²
	Mean [SD]
Text message engagement
Active days in SMS program¹	64.4 [21.7]	77.5 [18.6]	0.07
No. of SMS sent from participant	27.6 [21.4]	38.5 [58.2]	0.48
No. of URL links clicked	6.2 [7.9]	4.4 [8.8]	0.71
Ratio of URL links clicked/links sent	0.5 [0.5]	0.2 [0.4]	0.36
NRT use SMS queries responded to	7.3 [6.6]	7.8 [8.6]	0.85
Ratio of NRT use queries responded to/NRT queries sent	0.4 [0.6]	0.5 [0.4]	0.52

Days from first to last messages sent from participant

P values based on t-test

Abbreviations: SMS=text messages (short message service); SD=standard deviation; NRT=nicotine replacement therapy; URL=uniform resource locator