The model on wave 2 SRO (table 4, section a) shows that other characteristics (eg, demographics and psychopathology) being equal: (1) all combinations of smoking status and SRO history had statistically significant risks for wave 2 SRO relative to never smokers without prior SRO and (2) for each smoking category, the risks were considerably greater when the combined group involved a prior SRO. The data also show that former smoking and current smoking, in the absence of prior SRO, are valid predictors of an initial SRO. However, once a person has had a SRO, smoking status history does not change the risk prediction—the risk of recurrence is fully predicted by that prior SRO and the other characteristics. The second model, on wave 2 current smoking (table 4, section b), shows an expectedly substantial likelihood of being a current smoker in wave 2 for current smokers in wave 1, regardless of SRO history. Of interest, prior SRO predicted a contrasting reduction in the likelihood of smoking uptake in wave 2 for former smokers and never smokers.
