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用因子分析法对皮炎患者发样中微量元素Ｚｎ、Ｃｕ、Ｆｅ、Ｃａ 的测定值进行了统计分析，得出了人发中微量元素Ｚｎ、Ｃｕ、Ｆｅ、Ｃａ 含量的减少是导致皮炎发病的主要因素的结论。应用因子分析法所得结论与Ｑ 型非线性映射法统计所得结论一致，证明该法统计分析和结论的可靠性
Factor analysis was used to statistically analyze the measured values of trace elements Zn, Cu, Fe, and Ca in hair samples of dermatitis patients. It was concluded that the decrease of trace elements Zn, Cu, Fe, and Ca in human hair is the cause of dermatitis. The main factor is the conclusion. The conclusions obtained by applying the factor analysis method are consistent with the statistical conclusion obtained by the Q-type nonlinear mapping method, and the reliability of the statistical analysis and conclusion of the method is proved.