The developmental age at which a child gains the listed skill that is being lost at each AD substage is listed, an illustration of retrogenesis.
Here are the substages of Stages 6 and 7 in FAST:
- Stage 6: Moderately Severe Dementia
- 6a: Needs help putting on clothes (developmental age 5 years old)
- 6b: Needs help bathing (developmental age 4 years)
- 6c: Needs help using the toilet (developmental age 3–4 years) (removing clothing, wiping, disposing of tissue, flushing, redressing)
- 6d: Urinary incontinence (developmental age 2–3 years)
- 6e: Bowel incontinence (developmental age 2–3 years)
- Stage 7: Severe Dementia
- 7a: Speaks 5–6 words in a day (developmental age 15 months)
- 7b: Speaks only one word clearly (developmental age 1 year)
- 7c: Can no longer walk (developmental age 1 year)
- 7d: Can no longer sit up without assistance (developmental age 6–10 months)
- 7e: Can no longer smile (developmental age 2–4 months)
- 7f: Can no longer hold head up by self (developmental age 1–3 months)