The variables - region of the herd, size of the herd, source of semen, rodents control, number of pigs per pen, age of breeding sows, breeding sector room, source of feed and use of antibiotics - were selected to enter the multivariable model.
Damian survived the crush in pen 4, aged 20.
Le Pen has aged, but others, says Begag, are ready to pick up where he left off.
His flirtation with the extreme right grew in a series of abortive political campaigns, and Jean-Marie Le Pen, the aging founder of France's right-wing Front national (National Front) became the godfather of one of Dieudonné's children.
His love of songwriting stretched right back to childhood – he penned his first song aged seven – and while he was still a teenager he recorded his first demo tape at Moon's Studio in Minneapolis, earning himself a contract with Warner Bros.
In 1858, aged 16, he penned a letter from London to an American friend: "We have now been three years abroad.
He was at the height of puberty and presumably raging with hormones when, aged 16, he penned his ground-breaking Octet.
The final models revealed that all the five variables tested (season, pen type, age, stocking density and feed consumption) were associated with the probability of death among layers.
The books were written under a pen name by Dora Saint, who has died aged 98.
