Between which weeks did Patient B's PSA increase the most?

Between which weeks did Patient B's PSA increase the most?

• A. Week 1 to week 6
• B. Week 6 to week 10
• C. Week 10 to week 15
• D. Week 15 to week 18

Answer: (B)

Identify where the PSA value rises the most across the recorded time points. To determine this, compare how much PSA changes between each pair of consecutive weeks: week 1 to week 6, week 6 to week 10, week 10 to week 15, and week 15 to week 18. The interval with the largest positive change is the period of greatest increase. In Patient B’s data, the rise from week 6 to week 10 is larger than the increases observed in the other intervals, so that period shows the most substantial uptick in PSA. The other intervals have smaller increases (or little to no increase), which is why they don’t represent the greatest change.

Identify where the PSA value rises the most across the recorded time points. To determine this, compare how much PSA changes between each pair of consecutive weeks: week 1 to week 6, week 6 to week 10, week 10 to week 15, and week 15 to week 18. The interval with the largest positive change is the period of greatest increase.

In Patient B’s data, the rise from week 6 to week 10 is larger than the increases observed in the other intervals, so that period shows the most substantial uptick in PSA. The other intervals have smaller increases (or little to no increase), which is why they don’t represent the greatest change.