According to one embodiment, a medical information processing apparatus includes processing circuitry.
The processing circuitry acquires a first numerical value and a second numerical value, the first numerical value corresponding to a user's judgement based on an observed confounding factor, the second numerical value corresponding to the user's judgement based on the observed confounding factor and support information that supports the user's judgement. The processing circuitry extracts a difference between the first and second numerical values. The processing circuitry calculates a degree of influence of an unobserved confounding factor on the user's judgement based on the difference and the observed confounding factor.