A person's likelihood of becoming obese increased by 57 percent if he or she had a friend who became obese in a given time period, Fowler and Christakis showed in a paper in the New England Journal of Medicine in July 2007.
ຄວາມເປັນໄປໄດ້ຂອງຄົນທີ່ຈະກາຍເປັນໂລກອ້ວນເພີ່ມຂຶ້ນ 57 ເປີເຊັນຖ້າລາວມີເພື່ອນທີ່ເປັນໂລກອ້ວນໃນຊ່ວງເວລາໃດ ຫນຶ່ງ, Fowler ແລະ Christakis ສະແດງໃນເຈ້ຍໃນ New England Journal of Medicine ໃນເດືອນກໍລະກົດປີ 2007.