Fig. 1
From: Electronic cigarette use behaviors and motivations among smokers and non-smokers
Agreement Chart for the duration of EC use and duration of smoking cessation among former smokers. The size of the rectangle at each time point reflects the marginal totals for each variable. The area of exact agreement is the dark square, which represents the number of individuals who reported the same duration for EC use and smoking cessation. The lighter rectangle represents the number of individuals who reported similar (within one category) durations. The white square area represents area of disagreement