CSP-11 CSP-11 D6.02 · Domain 6 · Occupational Health and Applied Science · 10%
Epidemiology / public health stats
A resin line records 12 clinically confirmed work-related asthma cases among 80 exposed workers and 3 among 60 comparison workers over the same year. Leadership asks whether the agent is “proven” to be the cause. Build the comparison, quantify the association, and decide what action is justified now.
Updated . Independent CSP-11 practice. Not BCSP-endorsed. No pass guarantee.
Decision rule
Public-health / epidemiology capstone: define the population, the case, and the comparison.
RR and OR are ratios. BEI and PEL stay in their own systems. Association is not a control.
In 20 seconds
- Public-health / epidemiology capstone: define the population, the case, and the comparison.
- RR and OR need a 2×2 with denominators.
- BEI ≠ PEL ≠ TLV.
- A ratio does not close a hierarchy row.
How to apply Epidemiology / public health stats
THEORY: 2×2, person-time, bias. Then decide whether the plant needs exposure reconstruction or a control change — epidemiology alone does not install a guard. CALC: Use only the cells the stem gives. FIELD: Elevated OR for a job class. Next move is reconstruct tasks and exposures, then hierarchy — not a new slogan. ASSESS: Treating OR as proof that PPE failed, or BEI as a PEL, is the trap.
Worked case
Wrong first move: Issue a control from the OR alone. Correct move: Define cases; reconstruct exposure; then choose a control.
Why the rule holds
Related: 99, 37, 68.
Same rule, different setting
During a turnaround, contractors applying two-component coatings report new or worsening wheeze. The safety team must define cases consistently, establish denominators and timing, compare exposure groups, protect medical privacy, and reduce plausible inhalation exposure while clinical evaluation continues.
A renovation crew using spray polyurethane foam develops a cluster of respiratory symptoms. Before blaming the product or dismissing the reports, define cases, map person–place–time and tasks, compare similarly observed workers, and control plausible sensitizer exposure.
Picture / model
Case definition → 2×2 table → risk and risk ratio (or odds ratio when appropriate) → bias/confounding checks → exposure assessment → hierarchy controls → follow-up. Association guides action; it does not diagnose an individual or prove causation by itself.
Exam traps
Original SafePath contrasts for Epidemiology / public health stats. These are study traps, not recalled BCSP items.
| Trap | Correct read |
|---|---|
| BEI in range | Biological guidance, not the legal PEL |
| High relative risk | Association to investigate, not a control |
| Health fair | Admin / medical after the source |
| Remove the agent | Elimination / substitution |
Field move
Exposed risk=12/80=0.15; comparison risk=3/60=0.05. RR=0.15/0.05=3.0. Association alone does not prove cause.
Scenarios
Scenario 1 · Applied Scenario · CSP-11 D6.02
In a one-year cohort, 12 of 80 exposed workers and 3 of 60 comparison workers meet the same asthma case definition. What is the risk ratio?
Best action: 3.0
Why: Exposed risk=12/80=0.15; comparison risk=3/60=0.05. RR=0.15/0.05=3.0. Association alone does not prove cause.
Scenario 2 · Applied Scenario · CSP-11 D6.02
For the same cohort, exposed cases/noncases are 12/68 and comparison cases/noncases are 3/57. What is the cross-product odds ratio?
Best action: 3.35
Why: OR=(12×57)/(68×3)=684/204≈3.35. It differs from the risk ratio of 3.0 in these data.
Scenario 3 · Fundamental · CSP-11 D6.02
A report finds 12 suspected cases after a turnaround but has no consistent case definition or worker counts. Which first correction makes group comparison possible?
Best action: Define cases and observation period, then identify workers at risk in comparable groups.
Why: A rate or risk needs defined cases, population denominator, and time window. Collect task and exposure information before comparing groups.
If the stem says this
| Stem signal | Best direction |
|---|---|
| the stem gives a/(a+b) and c/(c+d) | relative risk |
| the stem gives case-control counts a,b,c,d | odds ratio ad/bc |
| BEI is offered as the legal limit | reject — PEL is legal |
Check before you leave
- ✓ RR and OR need a 2×2 with denominators.
- ✓ BEI ≠ PEL ≠ TLV.
- ✓ A ratio does not close a hierarchy row.
- ✓ Cluster without hours or headcount is not a rate.
Blueprint mapping
Epidemiology / public health stats is the SafePath study class for CSP-11 D6.02 inside CSP-11 Domain 6, Occupational Health and Applied Science (10%). This domain combines occupational hygiene with applied science: exposure assessment, public health, toxicology, ergonomics, chemistry, and physics.
SafePath uses the publicly posted CSP-11 outline as a study map. It does not reproduce official exam content, and it is not affiliated with or endorsed by BCSP or Pearson VUE.
Practice / flashcards / formulas
More classes in Occupational Health and Applied Science
Nearby lessons mapped to the same CSP-11 domain.
CSP-11 D6.02
Other classes on this task
Guides that use Epidemiology / public health stats
- CSP calculationsIncident rates, noise, ventilation, and unit checks
- Formula deskNamed expressions used in occupational-health items
- Manufacturing safety study guideExposure, noise, and process controls
- CSP-11 exam prep guideDomain weights, sample items, and a study sequence
- CSP-11 blueprint and weightsSeven published domains and the class map
Epidemiology / public health stats study questions
- What decision does the Epidemiology / public health stats class train?
- Public-health / epidemiology capstone: define the population, the case, and the comparison. This is independent SafePath CSP practice for CSP-11 D6.02. It is not an official BCSP item and it is not a pass guarantee.
- What exam trap shows up in Epidemiology / public health stats?
- A common miss treats this as sufficient: BEI in range The stronger read is: Biological guidance, not the legal PEL
- How does Epidemiology / public health stats map to the CSP-11 blueprint?
- SafePath maps this class to CSP-11 D6.02 in Domain 6, Occupational Health and Applied Science (10% of the published blueprint). Use the public outline for study planning. SafePath is not affiliated with or endorsed by BCSP.
Verify
Verify: Confirm current certification requirements with BCSP and technical requirements with the cited authoritative standard.