Changes in medication treatment and cigarette smoking from baseline to 3 years follow-up in the Swedish Bj?rkn?s study*.

*Data are given as the number of observations (%) or mean (SD).?Last observation carried forward for individuals who withdrew. Number of participants at 3 months: IG = 66, CG = 69. n at 1 year IG = 60, CG = 63. Number of participants at 2 years: IG = 58, CG = 63. n at 3 year IG = 58, CG = 62.?P- value for difference between groups generated using the Pearson Chi-Square test.��P- value generated using a general linear model with repeated measures.?IG/CG n = 37/49.��IG/CG n = 37/48.