Katie Price has admitted that she fears her son Harvey will die a premature death unless he gets his weight under control fast.

The 18-year-old suffers from a number of afflictions, including Prader-Willi syndrome, which causes weight gain and erratic behaviour, as well as partial blindness, diabetes and autism.

Earlier this week Harvey was rushed to hospital after complaining of chest pains, although he was subsequently given the all-clear to return home.

"When Harvey went into hospital, I feared the worst. I always do," Katie told The Sun. "The doctors have told me he's at high risk of having a heart attack. He's 27½st, wears 5XL clothes and he gets out of breath walking up the stairs. So of course I panicked.

"I can't see him living past 50 unless we sort his weight and his breathing out. I know it's horrible to say, but I wish he'd go before me because he wouldn't cope without me. He'd be so heartbroken and wouldn't understand where I'd gone.

"I love him, and I would never change him, but it's constant. It's exhausting. He knows he's got to lose weight but it's the Prader-Willi - he just wants to eat. He'll steal food, and he's on steroids that make him big.

"I'm not trying to give him a lot of food - look at my other kids, they're not big and fat like Harvey. I don't want him to be in 5XL clothes, or to not be able to go on proper walks without being out of breath. I don't want that, I come from a fit, healthy family.

"People don't appreciate how big he is until they see him. He can't fit in some cars, and on an aeroplane the seatbelts don't fit him. He loves rollercoasters but he can't go on them because the seats don't fit down on him."

Harvey is the eldest of Katie's five children.