Does scoring 0 in childhood mean I'm done for?

I'm in the UK and I've just had my assessment A with HealthHarmonie Minds, the assessor said I scored 0 for childhood, which I don't understand because although for 2 or 3 questions about my childhood I answered with a no, the rest were I can't remember and a few yes I did that, so surely I should've scored more than 0? My scores for adulthood were a 6 out of 9 and then the rest were 5 out of 9's. Does the fact that I scored 0 for childhood now mean it's unlikely I'll be diagnosed with ADHD in assessment B?