Nursing intervention sum variables were formulated on the basis of the factors. The Kolmogorov-Smirnov test was used to examine the distributions of the intervention sum variables, which were all normal. The relationships between the background characteristics and the intervention sum variables were investigated using one-way ANOVA, two-way ANOVA, MANOVA and linear regression; the statistical significance of each result was evaluated according to its P-value (P<0.05 being significant) (Polit and Beck, 2012). The internal consistency of the sum variables was assessed using Cronbach’s alpha coefficient (Burns and Grove, 2001).
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