Table 1.

Research process.

Stage	Description
1.	Two-stage random selection of representative sample of households (Central Statistical Office) a)Random selection of areas survey points based on the list of statistical regions developed in Poland for National Census purposes b)Random selection of households in every area survey point
2.	Data base of 36,886 households (Central Statistical Office)—quantity of purchase and consumption of food products in 91 sub-groups (in grams, kilograms, liters) per month in each household
3.	Conversion of consumption into one person per month in each household (in grams, kilograms, liters per person per month)—own calculations
4.	Energy and nutrient content in consumed food products in 91 sub-groups in each household (in kcal, g, mg, µg per day)—own calculations
5.	Average energy and nutrient content in sub-groups in kcal, g, mg, µg per person per day in all households—own calculations
6.	Average energy and nutrient contribution (in %) to the average Polish diet from each sub-group—own calculations
7.	Impact of socio-demographic and economic factors on the level and structure of energy and nutrients supply from milk and dairy products—own calculations