[Group therapy and smoking cessation].

There is reasonable evidence that groups are better than self-help, and other less intensive interventions. There is not enough evidence on their effectiveness compared to intensive individual counselling. From the point of view of the consumer who is motivated to make a quit attempt it is probably worth joining a group if one is available--it will increase the likelihood of quitting. From the public health perspective, groups are unlikely to make a substantial impact because of the low uptake.