Exposures |
||
Dimension |
Variables |
Way of Measurement |
Demographical |
Age, sex, educational level, marital status, family members, economical dependants |
Ad-hoc questions in a self-report questionnaire |
Work-demographical |
Type of company: private-public service, department, job position, seniority (in company, in job position-driver-), type of contract (fixed, temporal), salary, number of working days and type of schedule (shifts, rests) |
Ad-hoc questions in a self-report questionnaire |
Psychosocial stressors |
Job strain, Psychological Demands, Job Control, Social support ay work, Job insecurity |
JCQ Questionnaire |
Effort-Reward Imbalance (effort, job status, salary, job Esteem) |
ERI Questionnaire |
|
Specific Work Organization Exposures |
Number of work hours per shift, day or week, overtime work |
Self reports or company records |
Number of passengers per day/shift, seats/passengers ratio |
Self reports or company records |
|
Frequency of conflicts with passengers |
Self reports |
|
Unruly behavior of passengers |
Self reports |
|
Specific passenger’s demands |
Self reports |
|
Type of route |
Self reports or company records |
|
Frequency of unity (Bus) mal functioning, failures or breakdowns. |
Self reports or company records |
|
Frequency of rushing because of time demands |
Self reports |
|
Consequences of delays |
Self reports |
|
Frequency of traffic jam |
Self reports or company records |
|
Frequency of Weather conditions while driving (hot, cold, fog, etc)-one item each condition- |
Self reports |
|
Frequency of unexpected closing roads or blocked streets |
Self reports |
|
Frequency of: To be blocked by other driver, inadequate driving of others, aggressions from other drivers |
Self reports |
|
Policy officers or other authority’s demands |
Self reports |
|
Frequency of Violence, assaults, robberies |
Self reports |
|
Type of distraction while driving |
Self reports |
Outcome variables |
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Dimension |
Variable |
Way of Measurement |
Safety |
Number of disabling work accidents last year ( those keep you out from work) |
Self reports or company records |
Number minor work accidents last year (you could continue working) |
Self reports or company records |
|
Frequency of excessive speed up |
Self reports or company records |
|
Frequency of tickets or violation of traffic rules |
Self reports or company records |
|
Psychological-neuropsychological |
Fatigue |
Self reports (Yoshitake questionnaire or checklist strength questionnaire) |
Mental Health |
GHQ |
|
Sleep disorders |
? |
|
Attention span, memory, reaction time? |
? |
|
Cardio-metabolic |
BMI |
Self-report, weight and height objective measurements, company records |
Waist circumference, Waist-hip ratio |
Self-report Tape measure, company records |
|
Skin fold fat? |
? |
|
Cardiovascular symptoms |
Self-report |
|
Glucose |
Blood sample –Company records |
|
Cholesterol |
Blood sample –Company records |
|
Triglycerides |
Blood sample –Company records |
|
VFC |
Subsample? -Polar device |
|
Blood pressure |
Clinical? Point estimates? Ambulatory? |
Control variables |
||
Dimension |
Variable |
Way of Measurement |
Lifestyle |
Exercise |
Self report |
Diet |
Self report |
|
Skipping meals |
Self report |
|
Drinking |
Self report |
|
Smoking |
Self report |
|
Previous Diseases |
Current chronic disease(s) |
Self report |
Family history of disease |
Self report |
|
Medication |
Medication consumption |
Self report |
Personality |
Type D Personality, Hostility |
Self report |