Hashimoto et al. (A-7) developed a multiple regression model to predict the number of visits to emergency rooms at Jikei University hospitals in Tokyo for children having an asthma attack. The researchers found that the number of visits per night increased significantly when climate conditions showed a rapid decrease from higher barometric pressure, from higher air temperature, and from higher humidity, as well as lower wind speed. The final model demonstrated that 22 percent of the variation in the number of visits was explained by variation in the predictor variables mentioned above with eight other significant climate variables.