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Table 1 Characteristics of pedigrees to map susceptibility loci for smoking rate.

From: A genome-wide scan to identify loci for smoking rate in the Framingham Heart Study population

Category Mean ± SEM (Range) Sample SizeA
No. of subjects per pedigree 8.25 ± 0.31 (3–53) 313
No. of smokers per pedigree 3.92 ± 0.16 (1–25) 313
Age of subjects 43.76 ± .34 (9–83) 2583
   Male subjects 42.92 ± 0.49 (11–82) 1242
   Female subjects 44.54 ± 0.46 (9–83) 1341
Age of smokers 39.23 ± 0.39 (13–80) 1228
   Male smokers 38.73 ± 0.54 (15–79) 614
   Female smokers 39.73 ± 0.56 (13–80) 614
Self-reported cigarettes per day, 1970–1971 20.73 ± 0.35 (1–90) 1228
   Male smokers 23.51 ± 0.53 (1–90) 614
   Female smokers 17.95 ± 0.43 (1–60) 614
  1. AThe unit of measurement is number of pedigrees for the first two and number of individual subjects for all other rows.