Right after my mom did her IME with the PP (before going to the lab for chest x-ray and others), we were given 2 sheets and told to send any of them back to CIC. One is called e-Medical Info Sheet and the other is named e-Medical Health Case Details.
So, I sent (courier) both sheets along with RPRF receipt, PCC, IMM5669 and notarized death cert. to Singapore-VO. Since my mom had to do additional tests, it took some time for the PP to upload full medical report. But everything was done within 30-day deadline.
Now, sending the medical confirmation page(s) back to CIC may not carry any significance as CIC Medical Team will still wait for the PP to upload/send full medical report. It's just to save yourself if CIC ever blames you for not meeting deadline or something.