CBIC Test 3

Question 1

Which statistical test is most appropriate when comparing infection rates between two independent groups with large sample sizes?

Accepted Answer

Chi-square test

Answer

The chi-square test is appropriate for comparing proportions or rates between two or more independent groups when sample sizes are large.

Question 2

Under the NHSN definition, a healthcare-associated infection (HAI) is generally considered present when it occurs at least how many hours after admission?

Accepted Answer

48 hours

Answer

NHSN defines a healthcare-associated infection as one that occurs 48 hours or more after admission, when no evidence of infection was present at admission.

Question 3

Which element is NOT part of the chain of infection?

Accepted Answer

Vector capacity

Answer

The chain of infection consists of infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host; 'vector capacity' is not a named link in the chain.

Question 4

A hospital experiences an increase in ventilator-associated events (VAE). Which intervention targets the most evidence-based prevention bundle element?

Accepted Answer

Daily sedation interruption and spontaneous breathing trials

Answer

Daily sedation interruption paired with spontaneous breathing trials is a core bundle element that reduces ventilator days and associated events.

Question 5

Which personal protective equipment (PPE) sequence is correct when donning for contact and droplet precautions?

Accepted Answer

Gown → mask → goggles → gloves

Answer

CDC guidance specifies donning in the order gown, mask/respirator, goggles/face shield, then gloves so that gloves cover gown cuffs and are the last item to be donned.

CBIC - Certification Board of Infection Control Practice Test

CBIC - Certification Board of Infection Control Practice Test

CBIC Test 3