Method and apparatus for information analysis

A non-transitory computer-readable storage medium storing a computer program that causes a computer to perform a procedure comprising:

• referencing a memory storing item mapping information where, amongst a plurality of items included in a plurality of patient information records in which data entries associated with patients are registered under the plurality of items, each of a plurality of first items is mapped to, amongst the plurality of items, one or more different items whose registered data entries have relationships with the data entries registered under the first item, and identifying, based on the item mapping information, one or more third items having relationships with a second item designated amongst the first items;
• and
• performing an evaluation of a degree of similarity between a particular patient information record registering therein data entries associated with a particular patient under the plurality of items and each of the patient information records by using only the one or more third items or the second item and the one or more third items as comparison targets, and outputting result of the evaluation.