Is the shape of the decline in risk following quitting smoking similar for squamous cell carcinoma and adenocarcinoma of the lung? A quantitative review using the negative exponential model

•We compared rates of decline in excess risk after quitting smoking for two major lung cancer types.•Our estimations used 17 data sets for squamous cell carcinoma (SqC) and 19 for adenocarcinoma (AdC).•The years to halve the excess risk from continued smoking was 11.47 for SqC and 14.44 for AdC.•The...

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