The rate of falling during the five-month long study was the same, statistically, among those on placebo and those on 200, 400 or 600 IU of vitamin D daily, ranging from 44 to 60 percent, the researchers found.

• 经过统计分析，在为期5个月的研究中，每日摄入200、400或600单位维生素D组与安慰剂组的摔倒率相同。