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Table 1 Age and smoking habits for 129 healthy volunteers

From: No difference in striatal dopamine transporter availability between active smokers, ex-smokers and non-smokers using [123I]FP-CIT (DaTSCAN) and SPECT

  Number Mean age ± SD (range) in years Current average number of cigarettes per day ± SD (range) Total number of packages in lifetime mean (range)
Non-smokers 64 (34 males) 51.7 ± 18.5 (20 to 81) 0 0
Ex-smokers 39 (21 males) 59.2 ± 15.4 (25 to 83) 0 4,497 (66 to 28,220)
Active smokers 26 (15 males) 47.2 ± 19.4 (21 to 79) 11.2 ± 8.6 (1 to 30) 5,991 (60 to 24,630)