Exploratory mixed methods analysis of self-authored content from participants in a digital alcohol intervention trial

Collier, Elizabeth S.; Blomqvist, Jenny; Crawford, Joel; McCambridge, Jim; Bendtsen, Marcus

doi:10.1186/s13011-023-00569-4

Substance Abuse Treatment, Prevention, and Policy

Table 3 Medians of the posterior distributions of odds ratio (with 2.5% and 97.% percentiles) indicating associations with the odds of authoring any prompt, and prompts that fall into each thematic group, alongside the posterior probability of association

From: Exploratory mixed methods analysis of self-authored content from participants in a digital alcohol intervention trial

	Median of posterior distribution (2.5%; 97.% percentiles) Probability of association (OR < or > 1 in the direction of the median)
	Any prompt	Encouragement style	Level of awareness	Reasons	Strategy/goal	Timescale
Group (intervention vs. control)	2.36 (1.92; 2.93) > 0.99	1.06 (0.83; 1.37) 0.68	0.87 (0.64; 1.19) 0.81	0.86 (0.71; 1.03) 0.95	0.80 (0.66; 0.96) 0.99	0.52 (0.36; 0.75) > 0.99
Total weekly consumption	1.00 (0.99; 1.01) 0.40	1.00 (0.98; 1.01) 0.41	1.00 (0.98; 1.02) 0.34	1.00 (0.99; 1.01) 0.44	1.00 (0.99; 1.02) 0.85	0.99 (0.96; 1.02) 0.81
Episodes of heavy drinking	1.00 (0.98; 1.02) 0.43	1.00 (0.98; 1.02) 0.38	1.02 (1.00; 1.05) 0.96	1.01 (1.00; 1.03) 0.91	0.98 (0.97; 1.00) 0.98	1.02 (0.98; 1.05) 0.85
Sex (man vs. woman)	0.57 (0.45; 0.71) > 0.99	0.69 (0.52; 0.91) > 0.99	0.70 (0.49; 1.00) 0.97	0.65 (0.52; 0.80) > 0.99	0.85 (0.69; 1.06) 0.93	0.63 (0.40; 0.98) 0.98
Age	1.03 (1.02; 1.04) > 0.99	0.98 (0.97; 0.99) > 0.99	0.97 (0.95; 0.98) > 0.99	0.98 (0.97; 0.99) > 0.99	1.00 (0.99; 1.01) 0.53	1.00 (0.98; 1.02) 0.46
Alone with kids vs. alone no kids	1.32 (0.98; 1.77) 0.96	0.99 (0.62; 1.61) 0.51	1.06 (0.59; 1.87) 0.58	1.46 (1.04; 2.06) 0.98	1.02 (0.71; 1.47) 0.54	1.11 (0.51;2.39) 0.60
Partner not living together vs. alone no kids	1.21 (0.76; 1.90) 0.80	1.48 (0.88; 2.50) 0.92	0.58 (0.28; 1.21) 0.08	1.47 (1.00; 2.19) 0.97	0.87 (0.56; 1.36) 0.73	0.96 (0.39; 2.31) 0.47
Partner living together no kids vs. alone no kids	0.99 (0.71; 1.36) 0.54	0.91 (0.60; 1.39) 0.67	0.87 (0.52; 1.46) 0.30	0.93 (0.67; 1.30) 0.66	1.07 (0.79; 1.45) 0.66	1.00 (0.52;1.93) 0.50
Partner living together with kids vs. alone no kids	1.34 (0.90; 1.97) 0.93	0.95 (0.65; 1.38) 0.61	0.71 (0.43; 1.14) 0.08	1.35 (1.01; 1.80) 0.98	1.02 (0.77; 1.35) 0.56	0.98 (0.52; 1.79) 0.47
Importance	1.09 (1.01; 1.18) 0.98	1.17 (1.03; 1.33) > 0.99	1.09 (0.93; 1.29) 0.88	1.10 (0.01; 1.21) 0.99	1.02 (0.94; 1.10) 0.65	1.07 (0.88; 1.30) 0.75
Know-how	1.03 (0.99; 1.07) 0.95	0.97 (0.92; 1.02) 0.91	1.01 (0.96; 1.07) 0.57	1.03 (0.99; 1.06) 0.92	0.97 (0.94; 1.01) 0.94	0.98 (0.90; 1.06) 0.73
Confidence	0.98 (0.94; 1.02) 0.84	1.00 (0.95; 1.06) 0.53	1.04 (0.97; 1.11) 0.85	1.01 (0.98; 1.06) 0.80	1.01 (0.97; 1.05) 0.69	1.03 (0.95; 1.13) 0.76

Notes: For the variable “group”, odds ratios greater than 1 indicate an increased likelihood of authoring a prompt among the intervention group compared to the control group. For the sex variable, odds ratios greater than 1 indicate that being a man increases the likelihood of authoring a prompt. For the household status variable, odds ratios greater than 1 for each status indicate an increased likelihood of authoring a prompt relative to living alone with no kids. All other relationships show condition associations with the odds of authoring a prompt, where odds ratios greater than 1 indicate an increased odds given a one-unit increase above the mean in the variable tested assuming all else is equal. Analysis on the presence of any prompt was based on the full parent study cohort (N = 2129) while analysis on the presence of the five thematic categories was based on respondents to the prompts module (N = 476).

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ISSN: 1747-597X

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