Question 113 – Data handling and analysis - Questions

A hospital trust investigated the efficacy of two sanitisation protocols on high-touch surfaces in clinical wards.

In Ward Block A, researchers implemented Protocol Alpha (Automated UV-C Light Treatment), while in Ward Block B, they implemented Protocol Beta (Manual Chemical Deep Cleaning). The mean microbial load, measured in colony-forming units per square centimetre ( $CFU/cm2\text{CFU/cm}^2$ ), was recorded 24 hours after the treatments.

Table 1: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 24 hours after sanitisation

Protocol Alpha (UV-C Light)	Protocol Beta (Manual Chemical)
12	8

To evaluate the long-term durability of the sanitisation, the researchers returned 14 days later to measure the mean microbial load on the same surfaces. During this 14-day period, both ward blocks only received standard daily maintenance cleaning.

Table 2: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 14 days after sanitisation

Protocol Alpha (UV-C Light)	Protocol Beta (Manual Chemical)
18	95

The clinical director reviewed the data from both Table 1 and Table 2.

What conclusion might they draw from both sets of results regarding the effectiveness and durability of the two protocols? Explain your answer using the data provided.

A hospital trust investigated the efficacy of two sanitisation protocols on high-touch surfaces in clinical wards.

Table 1: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 24 hours after sanitisation

Protocol Alpha (UV-C Light)	Protocol Beta (Manual Chemical)
12	8

Table 2: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 14 days after sanitisation

Protocol Alpha (UV-C Light)	Protocol Beta (Manual Chemical)
18	95

The clinical director reviewed the data from both Table 1 and Table 2.

What conclusion might they draw from both sets of results regarding the effectiveness and durability of the two protocols? Explain your answer using the data provided.

Data handling and analysis

Question 37

Table 1: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 24 hours after sanitisation

Table 2: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 14 days after sanitisation

Data handling and analysis

Question 37

Table 1: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 24 hours after sanitisation

Table 2: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 14 days after sanitisation

Data handling and analysis

Question 37

Table 1: Mean microbial load (CFU/cm2\text{CFU/cm}^2CFU/cm2) 24 hours after sanitisation

Table 2: Mean microbial load (CFU/cm2\text{CFU/cm}^2CFU/cm2) 14 days after sanitisation

Data handling and analysis Questions

Data handling and analysis

Question 37

Table 1: Mean microbial load (CFU/cm2\text{CFU/cm}^2CFU/cm2) 24 hours after sanitisation

Table 2: Mean microbial load (CFU/cm2\text{CFU/cm}^2CFU/cm2) 14 days after sanitisation

Data handling and analysis Questions

Table 1: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 24 hours after sanitisation

Table 2: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 14 days after sanitisation

Table 1: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 24 hours after sanitisation

Table 2: Mean microbial load ( $CFU/cm2\text{CFU/cm}^2$ ) 14 days after sanitisation