The impact is inevitable, such that your question took me aback, somewhat. If you are born into economic means, you will surely experience a different life than another who spent his early years (and probably the present as well) dirt poor. If you grew up with a sibling with a disability, you are far more likely to learn to be compassionate, and, as I've seen with private joy, an acquired toughness and eyes that can go from gentle and patient to steely and "Try it. See what happens" expression as fierce as said sibling's almost too-"triggerable" fire upon any transgression against their "special" sibling who, to them, is their brother/sister before anything else, and somebody they love in that often extra strong, extra protective family unit that can circle the wagons against bullying and "adult" mountains wrt insurance, therapies, and a level of expertise achieved by necessity that is worthy and equal to Bachelors, even Masters and higher level college study.
A child who grows up in that environment very likely learns some degree of self-sufficiency WAY early, as well as patience, empathy, and even an internalized identification as part of a larger unit - a larger community.
Heh....boy took THAT scenario pretty far. I think the way our childhood effects us is just as thoroughly, if maybe with some less drama or so obviously attributable personality, identity, and life course.
Sadly, a childhood of neglect and abuse can produce as much strife, anger, anxiety, violence, even criminality as the above likely produces an adult with patience, resolve, a keen sense of personal, familial and social responsibility, and a skillset, social facility and drive that can only make the world a better place.
Most childhoods are much more mundane than either case, but a kid, say, who grows up in a musical family (or experiences) is more likely to find him/herself drawn to the arts professionally. Same goes for athletics, extreme focus on academics, even growing up with a military parent, and ever more so if your family endured many deployments.
Whew.... anyway....yeah, I think some effect is inevitable.