A recent study has shown that hostile behavior increases the risk of heart diseases. Women who are hostile during a fight with the husbands are more likely to suffer from sclerosis or heart disease than those who are not. Men do not appear to increase their risk of heart disease, but having a controlling wife increases the odds. The three-year study, conducted by specialists at the University of Utah, studied 150 married couples, around their 60s or 70s, with no heart disease; they were invited to engage in quarrel, while their coronary arteries were examined. A sensible topic was chosen by the couple and it was debated for six minutes. Statements like "You can be so stupid sometimes" were regarded as hostile, while those such as "You're too negative all the time" were considered dominant. "Oh, that's a good idea, let's do it" was considered a warm reply. Tests were made 2 days after the fight occurred. Tim Smith, a scientist in the study, said that hostility in the husband or wife narrows the woman's arteries, while a dominant conduct affects the man. "Women who are hostile are more likely to have atherosclerosis, especially if their husbands are hostile too. The levels of dominance or control in women or their husbands are not related to women's heart health. In men, the hostility, their own or their wife's, wasn't related to atherosclerosis. But their dominance or controlling behavior, or their wife's dominance, was related to atherosclerosis in husbands. A low-quality relationship is a risk factor for cardiovascular disease."