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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.