The reference for these tables is: Schnall PL, Pieper C, Schwartz JE, Karasek RA, Schlussel Y, Devereux RB, Ganau A, Aldermen M, Warren K, Pickering TG. The relationship between job strain, workplace diastolic blood pressure, and left ventricular mass index. JAMA. 1990;263:1929-1935.

Table 1. - Descriptive Statistics for Study Sample

Variable All Subjects (n=215) Controls (9n=128) Cases (n=87)
       
Screening systolic BP, mm Hg * ^ 125.8 (14.0) 118.9 (10.7) 136.0 (11.9) ~
Screening diastolic BP, mm Hg ^ 81.9 (10.6) 75.2 (6.9) 91.8 (6.4) ~
Age, y ^ 45.0 (8.7) 42.6 (8.5) 48.5 (7.8) ~
Body-mass index, kg/cm2 ^ 26.2 (3.1) 25.4 (2.6) 27.3 (3.3) ~
Education, y ^ 14.2 (2.5) 14.3 (2.5) 13.9 (2.6)
Regular drinkers, % 27 20 38 ~
Type A behavior, % 40 42 36
Physical exertion level ^ $ 1.9 (0.79) 1.9 (0.78) 1.9 (0.81)
White Race, % 81 81 82
Current Smokers, % 22 22 23
Decision latitude ^ || 35.4 (6.1) 36.1 (5.8) 34.4 (6.5) @
Psychological work load ^ || 30.9 (6.1) 31.0 (5.9) 30.7 (6.5)
Job strain, % 21 17 28

*BP indicates blood pressure.

^ Values are mean (SD)

~ P<.01 according to t test

$ Responses are scored on a Likert scale of 1 to 4

|| Responses are scored on a scale of 12 to 48

@ P=<.05 according to t test

Table 2. - Comparison of Participants and Nonparticipants on Selected Risk Factors

  Participants (n=125) Nonparticipants (n=165)
Outcome Variables    
Hypertensive, % 40 41
Screening systolic BP* 125.8 127.3
Screening diastolic BP 81.9 82.8
Independent Variables    
Age, y 45.0 43.5 ^
White race, % 81 80
Education, y 14.2 14.0
Body-mass index, kg/m2 26.2 26.0
Job Strain, % 21 25 ||

*BP indicates blood pressure

^ P<.05.

|| Thirty-six non participants completed the Job Content Survey

Table 3. - Logistical Regression Analysis (n=215)*

  Odds Ratio 95% Confidence Interval z
Age,y      
41-50 vs 30-40 4.74 1.97 to 11.39 3.47
51-60 vs 30-40 8.3 3.03 to 22.75 4.11
Body-mass index, kg/m2 1.33 1.17 to 1.51 4.46
Regular drinker vs other 2.76 1.28 to 5.93 2.59
High job strain vs other 3.09 1.30 to 7.30 2.57

* After controlling for race, education, smoking, type A behavior, physical exertion level, 24-hour urine sodium excretion, and work site.

Table 4. - Job Characteristics and Psychological Variables by Case Status*

  Controls (n=128) All Cases (n=87) New Cases (n=20) ^ Cases Receiving Treatment (n=30) @
Job Content Questionaire        
Decision latitude $ 36.0 34.5 34.1 36.3
Psychological work load $ 30.7 31.1 31.9 32.5
Job strain, % 17 28 || 30 23
Jenkins Activity Survey        
Type A behavior, % 40.3 38.3 39.8 42.8
Symptom Checklist 90R ~        
Anxiety 52.8 55.3 54.8 53.4
Hostility 52.5 53.6 52.9 54.4
Speilberger Anger Questionaire        
Anger in # 24.4 24.6 24.2 24.3
Anger out # 14.2 14.3 14.0 15.0
Total Anger** 46.7 46.8 45.7 47.7

* Analysis of covariance was used, controlling for age. There was no statistically significant differences between groups.

^ Cases no currently receiving antihypertensive medication and who had no history of treatment or of high blood pressure.

@ At time of recruitment.

$ Responses are scored on a scale of 12 to 48.

|| P=<.05.

~ Responses are scored on a scale of 35-81.

# Responses are scored on a scale of 8 to 32.

** Responses are scored on a scale of 20 to 80.

For more information regarding this site, e-mail us at: cse@workhealth.org