YSK: that in crush/ crowd asphyxiation deaths, multiple factors often come into play besides crushing chest injury, including things like carbon dioxide exchange from exhalation, and air flow, making petite women and children especially vulnerable.
from /r/YouShouldKnow
YSK：圧迫死・群集窒息死では、胸部の圧迫以外にも、呼気による二酸化炭素の交換や空気の流れなど、複数の要因が絡み合っていることが多く、小柄な女性や子供は特に被害を受けやすいことがわかっています。