They added that the oldest is 78, with all 79 people injured understood to be British.
Seven remain in hospital in a stable condition.
Merseyside Police declined to say what drug the 53-year-old man arrested over the incident is alleged to have taken.
“We wouldn’t go into this detail at this stage of the investigation,” the force said.
Police are still questioning the driver and were granted further time in an extension on Wednesday.
Officers have until Thursday evening to question the man from West Derby.
He is in custody on suspicion of attempted murder, dangerous driving and drug driving.
The force previously said they believe the car, which drove into the crowd, was able to follow an ambulance crew attending to someone suffering a heart attack, after a road block was temporarily lifted.
Hundreds of thousands of Liverpool fans had turned out to celebrate their team’s Premier League victory when the incident unfolded on Water Street just after 6pm on Monday.
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