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Table 1 Prediction of app adherence and quit attempts: univariable and multivariable logistic regression analyses (N = 217–235)

From: “At least someone thinks I’m doing well”: a real-world evaluation of the quit-smoking app StopCoach for lower socio-economic status smokers

Variable Category OR (95% CI)
App adherence Quit attempts
Univariable Multivariable Univariable Multivariable
Participant and smoking characteristics
 Municipality Roermond (ref.) 1   1 1
Goeree-Overflakkee 0.94 (0.52–1.71)   1.20 (0.64–2.22) 1.21 (0.58–2.54)
Hulst 0.58 (0.21–1.61)   0.60 (0.19–1.90) 0.56 (0.16–2.01)
Stadskanaal 0.54 (0.26–1.12)   0.34 (0.14–0.85)* 0.55 (0.19–1.55)
Weststellingwerf 1.27 (0.63–2.54)   1.06 (0.51–2.20) 0.72 (0.30–1.70)
 Smokes < 30 min after waking Yes 1.38 (0.72–2.64)   1.52 (0.74–3.13)  
 Previous quit attempt(s) Yes 1.75 (0.99–3.10)+ 1.45 (0.77–2.74) 2.09 (1.10–3.96)* 1.62 (0.81–3.24)
 Professional coach Yes 4.33 (2.20–8.52)*** 4.06 (1.94–8.50)*** 4.75 (2.50–9.03)*** 4.55 (2.29–9.06)***
Reason(s) to quit*
 Example for (own) children Yes 1.41 (0.80–2.50)   1.57 (0.86–2.86)  
 Financial Yes 1.17 (0.65–2.11)   1.31 (0.70–2.42)  
 Longevity Yes 1.67 (0.94–2.97)+ 0.90 (0.42–1.94) 1.57 (0.86–2.86)  
 Physical condition and energy Yes 1.38 (0.81–2.36)   1.08 (0.61–1.91)  
 Other Yes 1.24 (0.61–2.49)   1.51 (0.73–3.12)  
# Cigarettes per day   1.00 (0.98–1.02)   1.00 (0.97–1.02)  
# Reasons to quit smoking   1.29 (1.03–1.61)* 1.23 (0.93–1.63) 1.22 (0.98–1.53)+  
Initial app usage characteristics
Enabled push notifications Yes 2.13 (1.01–4.47)* 2.18 (0.92–5.18)+ 1.66 (0.74–3.73)  
Virtual coach Female 0.81 (0.45–1.44)   0.79 (0.43–1.45)  
  1. +p < 0.10, *p < 0.05, **p < 0.01, ***p < 0.001. Adherence was coded [1] for app users with activity on/after their quit day, [0] for app users without activity on/after quit day (only preparation/last day before quitting). Quit attempt was coded [1] for app users who indicated abstinence at some point, [0] for app users who never indicated abstinence. Multivariable model Adherence χ2(5) = 25.61, p < 0.001, Cox & Snell R2 = 0.11, Nagelkerke R2 = 0.15; Quit attempts χ2(6) = 30.42, p < 0.001, Cox & Snell R2 = 0.12, Nagelkerke R2 = 0.17