Based on the search results provided, here are some key statistics regarding sexual abuse of stepdaughters by stepfathers:
- A study of 930 adult women in San Francisco found that 17% (about 1 in 6) of women who had a stepfather as a principal figure in childhood reported being sexually abused by him .
- In comparison, only 2% (about 1 in 40) of women reported being sexually abused by their biological fathers .
- The sexual abuse by stepfathers tended to be more serious:47% of incest cases involving stepfathers were categorized as "very serious sexual abuse"26% of cases involving biological fathers were categorized as "very serious"
- Children living with a single parent who has a live-in partner are at the highest risk of sexual abuse - they are 20 times more likely to be victims compared to children living with both biological parents .
- In the 2019 Crime Survey for England and Wales, 6% of respondents who reported childhood sexual abuse said they had been abused by their stepfathers, compared to 5% by biological fathers .
It's important to note that while these statistics show an increased risk associated with stepfathers, the majority of stepfathers do not abuse their stepchildren. Additionally, many cases of abuse go unreported, so the true prevalence is likely higher than official statistics indicate.
