IHP 340 Module Six Worksheet (1) - Copy
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Module Six Worksheet
Identification of Methods and Interpretation of Results
Prompt
:
Review Table 1 below and then complete the Module Six Worksheet steps.
Note: the chi-square (c
2
) test is covered in Module Seven.
Table 1: Characteristics of Women According to Intake of Alcohol
Variable
Nondrinker*
Drinker*
Test Statistic**
P
value
Mean age of mother at birth (years)
28.2 +
4.4
30.1 +
4.4
19.16
<.0001
% of mothers with education > 12 years 71.1%
77.6%
226.9
<.0001
% of mothers who smoked during pregnancy
7.5%
12.0%
100.7
<.0001
Prepregnancy BMI (kg/m
2
)
23.8 +
4.6
23.7 +
4.3
0.8
0.469
Note: intake of alcohol was during pregnancy except for prepregnancy BMI comparison where drinking status was also prepregnancy.
*Continuous variables presented by mean +
standard deviation, categorical variables as %
** Test statistic is either a
2 value or a t-value
Reference:
Dale, M. T. G., Bakketeig, L. S., and Magnus, P. (2016). Alcohol consumption among first-time mothers and the risk preterm birth: A cohort study. Annals of Epidemiology 26, 275–282
Steps
:
For this assignment, complete the following steps:
1.
Complete this worksheet by replacing the bracketed text with the relevant information. Use Table 1 as your source of information. Use the provided completed cells in the matrix to help you fill in the rest of the cells. 1
Variable 1
Variable 2
Name of Variable 1 (Provide Units or Categories)
Quantitative (continuous) or Categorical?
Name of Variable 2 (Provide Units or Categories)
Quantitative (continuous) or Categorical?
Appropriate Statistical Test to use
Corresponding Research Question
P value
Pregnancy BMI
Quantitative
Drinker type (nondrinker or drinker)
Categorical Two-sample independent t-test
Is the BMI amongst the 2 drinking type mothers different?
0.469
Percentage of mothers with an education >12 years
Categorical
Drinker type
(Alcoholic consumption or non-
alcoholic consumption)
Categorical Chi square test Did the amount of education received vary by mothers who drank and those who did not?
<0.0001
Pre-pregnant intake of alcohol (drinker vs nondrinker)
Categorical
Smoked during pregnancy (y/n)
Categorical
Chi square test
Is there a difference in the percentage
of mothers who smoked during pregnancy versus the mothers of the drinker and non-drinker groups?
<0.0001
Drinker type (nondrinker or drinker)
Categorical Age of mother when child is born (years)
quantitative (continuous)
Two sample independent T-test. Does the age of mothers vary between the two drinking types?
<.0001
Write out a complete answer to each of the four research questions stated in the matrix. Be sure to state what is being compared and what group or groups did better and by how much.
Is the BMI amongst the 2 drinking type mothers different?
•The T-test indicates there is no relationship between the Body Mass Index of a drinker versus a nondrinker mother becoming pregnant and her age at the time when their child is born.
2
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