Skip to main content
construction release_alert
Scholars@Duke will be undergoing maintenance April 11-15. Some features may be unavailable during this time.
cancel
Journal cover image

Sources of variability in John Henryism.

Publication ,  Journal Article
Whitfield, KE; Brandon, DT; Robinson, E; Bennett, G; Merritt, M; Edwards, C
Published in: Journal of the National Medical Association
April 2006

To decompose sources of individual differences in coping as measured by John Henryism among African Americans.Analyses described in this study are based on the pairwise responses from 180 pairs of same-sex, African-American twin pairs who participated in the Carolina African-American Twins Study of Aging (CAATSA). The sample consisted of 85 monozygotic (MZ) and 95 dizygotic (DZ) twin pairs.Environmental factors account for most of the variance (65%) in John Henryism scores, with the remaining variance attributable to additive genetic factors (35%). The test of the genetic component suggested that the 35% represented a statistically significant proportion of variance.The vast majority of recent studies on African Americans and health outcomes have focused on the impact of psychosocial factors on diseases such as hypertension and diabetes, with relatively little attention to possible genetic contributors. Previous research on psychosocial indices and their relationship to cardiovascular health among African Americans has focused on assessment and epidemiological explorations rather than understanding the etiology of variability in such measures.

Duke Scholars

Published In

Journal of the National Medical Association

EISSN

1943-4693

ISSN

0027-9684

Publication Date

April 2006

Volume

98

Issue

4

Start / End Page

641 / 647

Related Subject Headings

  • Twins, Monozygotic
  • Twins, Dizygotic
  • Socialization
  • Registries
  • Public Health
  • North Carolina
  • Middle Aged
  • Male
  • Humans
  • Genetic Variation
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Whitfield, K. E., Brandon, D. T., Robinson, E., Bennett, G., Merritt, M., & Edwards, C. (2006). Sources of variability in John Henryism. Journal of the National Medical Association, 98(4), 641–647.
Whitfield, Keith E., Dwayne T. Brandon, Elwood Robinson, Gary Bennett, Marcellus Merritt, and Christopher Edwards. “Sources of variability in John Henryism.Journal of the National Medical Association 98, no. 4 (April 2006): 641–47.
Whitfield KE, Brandon DT, Robinson E, Bennett G, Merritt M, Edwards C. Sources of variability in John Henryism. Journal of the National Medical Association. 2006 Apr;98(4):641–7.
Whitfield, Keith E., et al. “Sources of variability in John Henryism.Journal of the National Medical Association, vol. 98, no. 4, Apr. 2006, pp. 641–47.
Whitfield KE, Brandon DT, Robinson E, Bennett G, Merritt M, Edwards C. Sources of variability in John Henryism. Journal of the National Medical Association. 2006 Apr;98(4):641–647.
Journal cover image

Published In

Journal of the National Medical Association

EISSN

1943-4693

ISSN

0027-9684

Publication Date

April 2006

Volume

98

Issue

4

Start / End Page

641 / 647

Related Subject Headings

  • Twins, Monozygotic
  • Twins, Dizygotic
  • Socialization
  • Registries
  • Public Health
  • North Carolina
  • Middle Aged
  • Male
  • Humans
  • Genetic Variation