Question
-What is the independent variable in this table?
Menopausal transition group, age (years), triglycerides (mmol/l), or HDL cholesterol (mmol/l)?
-Describe the independent variable fully (how it was operationalized), if it is categorical provide all categories, if it is continuous provide units.
-Was type of variable is the independent variable in this table?
binary, ordinal, nominal, or continuous
-There are several potential dependent variable(s), we will focus on HDL, what type of variable is this?
binary, ordinal, nominal, or continuous
Table 1 Waist circumference, lipoprotein profile and insulin resistance markers in the four groups of women studied. Results are expressed as meant standard deviation Group ANOVA Variable PreM (n 29) MTM (n 35) MTA (n 29) PostM (n 31) p valine Age (years) 33 5.6 47 t 3.3 49 t 3.0 55 t 5.6 0.0001 Waist circumference (cm) 77.8 t 12 88.0 t 10.9" 90.6 t 10.2 88.1 t 10.8" 0.0002 1.19 t 0.59 1.28 t 0.71 1.42 t 0.50 0.0001 Triglycerides (mmoVI) 0.75 t 0.28 LDL cholesterol (mmoVI) 2.80 t 0.61 3.48 t 0.88 3.67 t 0.96" 4.00 t 1.14 0.002 HDL cholesterol (mmol/1) 1.47 t 0.28 1.41 t 0.33 1.54 t 0.42 1.48 t 0.34 0.49 Triglyceride/HDL cholesterol 0.53 0.27 0.97 t 0.67 0.96 t 0.77 1.03 t 0.52 0,007 4.8 t 0.4 4.9 t 0.4 5.2 t 0.7 0.04 Fasting glucose (mg/dl) 4.6 t 1.4 Fasting insulin (ulUMml 9.3 t 4.9 10.7 t 5.4 13.3 t 6-2 12.5 t 9.2 0.09 2.03 t 1.14 2.23 t 1.34 2.92 t 1.41 2.86 t 2.39 0.09 HOMA QUICKI 0.35 t 0.02 0.34 t 0.02 0.33 t 0.02 0.34 t 0.03 0.06 McAuley index 8.7 t 1.7 7.4 t 1.6 6.8 t 1.4 6.8 1.4 0.0001 Significantly different vs. PreM groups', significantly different vs. MTM group: ,significantly different vs. MTA group PreM, premenopausal women; MTM, women in the menopausal transition with irregular menstrual cycles; MTA, women in the menopausal transition with 3-6 months of amenorrhea: PostM, postmenopausal women: LDL, low density lipoprotein: HDL, high density lipoprotein: HOMA, Homeostasis Model Assessment; QUICKI, Quantitative Insulin Sensitivity Check Index
Explanation / Answer
124 women in four different menopausal groups were recruited to form the groupings, which are
premenopausal (PreM) 29 in the menopausal transition but still menstruating (MTM) 35 menopausal transition within 3-6 months of amenorrhea (MTA) 29 postmenopausal women (PostM) 31
