The system of education in Iceland is divided in four levels: playschool, compulsory, upper secondary and higher, and is similar to that of other Nordic countries.
This score was divided in four levels of informal socializing; very low (scores 2 + 3, n = 19 neighborhoods), low (score 4 = 15 neighborhoods), middle (scores 5 + 6, n = 22 neighborhoods) and high (scores 7 + 8, n = 17 neighborhoods).
Second, participants were asked to reflect on their former 'clerkship experience' by using a nominal scale used in research by Peeraer et al. The scale is divided in five levels: level 1 (not seen, not performed), level 2 (demonstrated, but not performed), level 3 (performed one time), level 4 (performed approximately three times) and level 5 (performed 10 times or more).
'importance of skills in rural practice' with a five-point Likert-type scale (1= strongly disagree; 5= strongly agree); and 'clerkship experience' using a nominal scale divided in five levels: level 1 (not seen, not performed) to level 5 (performed 10 times or more).
Then, the explanatory variables were divided in two levels: - First level - child: gender (male or female); age (< 4 years or ≥ 4 years); resides with mother and father (no or yes), household overcrowding (≤ 0.5, 0.5 - 0.79 or ≥ 0.8 person/room), house ownership (no or yes), parents' level of education (up to 8 yrs or more than 8 years) and household income (up to 5 BMW or more than 5BMW).
The AHP problem can be divided in four hierarchical levels: objective, criteria, sub-criteria, and alternatives.
According to its total score, the TQ is divided in four distress levels: mild (0 30), moderate (31 46), severe (47 59), very severe (60 84) [ 15].
For analysis purposes the score was divided in three tertiles of increasing stress level.
Anatomically, IVC is divided in three segments, and according to the level affected by the tumor, the symptoms may vary.
Dehydrin isoforms were divided in three groups based on the expression level during the desiccation process in three different tissues (leaves, roots and callus).
