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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Soc Sci Med. 2013 Jun 21;93:139–146. doi: 10.1016/j.socscimed.2013.06.016

Table 3.

Prevalence ratios of hypertension associated with SES indicators stratified by level of John Henryism, and results of tests for multiplicative interaction between John Henryism and SES categories, among male non-retirees in the Jackson Heart Study.

Prevalence ratios (95% CI) Interaction coefficients and global P values for interaction
Characteristics Alla Low John Henryismb High John Henryismb SES*John Henryism interactionc SES*John Henryism interactiond
Income N=654 N=607
Low tertile 0.99 (0.87, 1.13) 0.85 (0.69, 1.05) 1.12 (0.95, 1.33) 0.27 (0.14)* 0.27 (0.15)*
Middle tertile 1.09 (0.98, 1.21) 1.02 (0.88, 1.19) 1.16 (1.00, 1.35) 0.13 (0.11) 0.11 (0.12)
Top tertile 1 1 1 P value 0.06e P value 0.10 e
Education N=657 N=607
≤HS 0.97 (0.85, 1.12) 0.94 (0.74, 1.19) 0.99 (0.83, 1.19) 0.04 (0.15) -0.04 (0.15)
HS 1.03 (0.90, 1.19) 1.00 (0.81, 1.24) 1.06 (0.88, 1.28) 0.05 (0.14) 0.05 (0.16)
Some college 1.04 (0.93, 1.18) 1 1.05 (0.89, 1.25) 1 1.03 (0.87, 1.23) 1 -0.02 (0.12) 0.01 (0.13)
≥College 1 1 1 P value 0.47e P value 0.46 e
Occupation N=655 N=604
Manual 1.06 (0.95, 1.20) 1.03 (0.86, 1.22) 1.09 (0.94, 1.28) 0.06 (0.12) 0.04 (0.13)
Sales 1.06 (0.90, 1.24) 1.15 (0.93, 1.42) 0.95 (0.74, 1.21) -0.19 (0.17) -0.14 (0.18)
Service 1.08 (0.94, 1.24) 1.08 (0.88, 1.33) 1.08 (0.89, 1.31) -0.004 (0.14) -0.07 (0.16)
Management 1 1 1 P value 0.23 e P value 0.36 e
Childhood SES N=632 N=589
Low tertile 0.88 (0.76, 1.02) 0.83 (0.67, 1.03) 0.94 (0.77, 1.15) 0.09 (0.12) 0.10 (0.13)
Middle tertile 1.09 (0.96, 1.24) 1.00 (0.83, 1.21) 1.19 (1.00, 1.42) 0.16 (0.12) 0.16 (0.13)
High tertile 1 1 1 P value 0.21 e P value 0.23 e
Cumulative SES N=657 N=610
Low tertile 0.96 (0.85, 1.09) 0.90 (0.74, 1.08) 1.04 (0.87, 1.24) 0.13 (0.12) 0.12 (0.13)
Middle tertile 1.03 (0.92, 1.15) 0.92 (0.78, 1.08) 1.15 (0.98, 1.35) 0.22 (0.12)* 0.20 (0.13)
High tertile 1 1 1 0.08 e 0.14 e

HS = High school; N = sample size; SES = Socioeconomic status.

*

=p<0.05,

**

=p<0.01,

***

=p<0.001.

a

Model for all male non-retirees, includes age and SES indicator.

b

Model includes age, SES indicator, John Henryism and SES*John Henryism interaction.

c

Beta estimate and standard error for the interaction terms from a model that includes age, SES indicator, John Henryism and SES*John Henryism interaction.

d

Beta estimate and standard error for the interaction terms from a model that includes age, SES indicator, stress score, John Henryism and SES*John Henryism interaction.

e

One-sided p value from the joint test of SES*John Henryism interaction terms.