Table 1.
Baseline descriptive characteristics of study participants
(Mean values and standard deviations)
| Total sample (n 50) | Low polyphenol OO (n 25) | High polyphenol OO (n 25) | P * | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | ||
| Socio-demographics | |||||||
| Age (years) | 38·5 | 13·9 | 38·1 | 14·8 | 39·0 | 13·2 | 0·818 |
| Education (years) | 17·3 | 3·5 | 17·3 | 4·2 | 17·2 | 2·8 | 0·968 |
| Sex | |||||||
| % | % | % | |||||
| Females | 66 | 64 | 68 | 0·765 | |||
| Males | 34 | 36 | 32 | ||||
| Region of birth | |||||||
| % | % | % | |||||
| Australia, NZ, Pacific | 70 | 68 | 72 | 0·321 | |||
| Islanders | |||||||
| Europe | 10 | 4 | 16 | ||||
| South America | 8 | 12 | 4 | ||||
| Middle East and Asia | 12 | 16 | 8 | ||||
| Anthropometrics | |||||||
| Height (cm) | 168·9 | 9·6 | 170·6 | 10·4 | 167·2 | 8·6 | 0·22 |
| Weight (kg) | 70·7 | 12·8 | 72·7 | 13·7 | 68·5 | 11·8 | 0·249 |
| BMI (kg/m2) | 24·7 | 3·5 | 24·9 | 3·7 | 24·4 | 3·2 | 0·617 |
| Waist circumference (cm) | 86·9 | 11·2 | 88·2 | 11·9 | 85·6 | 10·6 | 0·434 |
| Weight status categories† | |||||||
| % | % | % | |||||
| Underweight | 2 | 0 | 4 | 0·252 | |||
| Normal weight | 50 | 56 | 44 | ||||
| Overweight | 44 | 36 | 52 | ||||
| Obese | 4 | 8 | 0 | ||||
| Waist circumference categories‡ | |||||||
| % | % | % | |||||
| Normal | 50 | 44 | 56 | 0·632 | |||
| High risk | 16 | 20 | 12 | ||||
| Very high risk | 34 | 36 | 32 | ||||
| Biochemical indices | |||||||
| HDL-cholesterol efflux (%) | 53·1 | 4·8 | 52·7 | 4·6 | 53·3 | 5·0 | 0·663 |
| TAG (mmol/l) | 1·0 | 0·5 | 1·1 | 0·7 | 0·9 | 0·3 | 0·334 |
| TC (mmol/l) | 5·0 | 1·0 | 4·9 | 1·1 | 5·2 | 0·9 | 0·37 |
| HDL-cholesterol (mmol/l) | 1·5 | 0·3 | 1·5 | 0·3 | 1·6 | 0·3 | 0·15 |
| LDL-cholesterol (mmol/l) | 3·0 | 0·9 | 3·0 | 0·9 | 3·1 | 0·8 | 0·582 |
OO, olive oil; NZ, New Zealand; TC, total cholesterol.
*
P-values for testing between-group differences in continuous variables were derived from the independent samples t-test. P-values for examining associations between categorical variables were derived from the χ 2 test.
†
Weight status categories: underweight, BMI < 18·5 kg/m2; normal weight, 18·5 ≤ BMI < 25 kg/m2; overweight, 25 ≤ BMI < 30 kg/m2; obese, BMI ≥ 30 kg/m2(34).
‡
Waist circumference categories: normal, WC < 80 cm in women and <94 cm in men; high risk, 80–88 cm in women and 94–102 cm in men; very high risk: WC > 88 cm in women and > 102 cm in men(35).