a strong trendP = 3.01×10 −21
Furthermore, there was however a strong trend in CPD across age groups; cases in the uppermost quantile having a cigarette consumption of 3.2 CPD less than those in the lowest age quantile ( P = 3.01×10 −21 ).
Furthermore, there was however a strong trend in CPD across age groups; cases in the uppermost quantile having a cigarette consumption of 3.2 CPD less than those in the lowest age quantile ( P = 3.01×10 −21 ).