Table 4.

Brief statistical plan.

Statistical objectives	Independent variable	Dependent variable	Statistical analysis
To develop and pilot the Australian diabetes-specific quality of life questionnaire	Australian diabetes-specific quality of life questionnaire	N/Aa	Transcribe, code, and identify common themes in the interview data
To validate the Australian diabetes-specific quality of life questionnaire (study developed)	Australian diabetes-specific quality of life questionnaire	Factorial validation indicators: root mean square error of approximation, comparative fit index, and Tucker-Lewis index	Exploratory factor analysis, confirmatory factor analysis, and structural equation modelling
To examine the association between a low carbohydrate diet and glycemic control	Low carbohydrate diet	Glycemic control	Bivariate: ANOVAb and correlations. Multivariate: hierarchical regression controlling for sociodemographic covariates.
To examine the association between quality of life and a low carbohydrate diet	Low carbohydrate diet	Quality of life	Bivariate: ANOVA and correlations. Multivariate: hierarchical regression controlling for sociodemographic covariates.
To investigate whether a low carbohydrate diet mediates the relationship between quality of life and glycemic control	Low carbohydrate diet	Glycemic control and quality of life	Bivariate: ANOVA and correlations. Multivariate: hierarchical regression controlling for sociodemographic covariates.

^aN/A: not applicable

^bANOVA: analysis of variance