Exact(7)
Although dietary recalls and food records are used to assess dietary intake at individual level and over shorter periods, food frequency questionnaires (FFQ) are used to rank subjects of a given population according to their nutrient intake over longer periods.
In general the shorter version yields lower total energy intake reports but rank subjects in the same order [ 21].
The methods used were validated, but especially for the FFQs, which aim to rank subjects according to intake rather than to estimate absolute intake levels a calibration step may be needed when different cohorts are combined (47).
We have already shown these dietary data are robust enough for epidemiologic studies, when used either to compare group means or with rank subjects according to the levels of food consumption or nutrient intake (Mishra et al, 2003).
We have already shown that these dietary data are robust enough for epidemiologic studies, when used either to compare group means or with rank subjects according to the levels of food consumption [ 39].
Examiners were instructed to rank subjects separately for active caries and for filled surfaces as 0, no decayed or filled surfaces; 1, mild (1 2 affected surfaces); 2, moderate (3 6 affected surfaces); and 3, severe (>6 affected surfaces).
Similar(53)
Dietary fat intake was assessed with the 'Dobson short fat questionnaire' [ 20], which ranks subjects according to their fat intake.
In addition, FFQs are only suitable for ranking subjects rather than estimating the level of nutrient intake [ 14].
Initially, populations are quantitatively ranked based on molecular and morphological distinctiveness and selected for conservation priority based on these ranks subject to the limitation that there must be at least one population from each ecotype (six in the case of rainbow trout) or major drainage system (eight in the case of BC – see Taylor 2004).
to rank the subjects according to the 4 levels of the Clinical Oral Health Index (COHI) (Table 2).
A fourth algorithm was then used to rank the subjects according to the 4 levels of the Clinical Oral Care Needs Index COCNII) (Table 3).
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