pfa

Part B, C, and D:
Part B
Use STATA where relevant. Interpret all of your results. You cannot use the same articles as your classmates nor can you use the same article for both 1 and 2-they must be TWO DIFFERENT ARTICLES.
1. Find a journal article that uses a chi-squared test (Pearson’s test) to test for
independence of two categorical variables (in a contingency table).
1. Write the reference to the article(hint:can use pubmed.gov or a particular medical journal and search for “chi-squared test” and a specific disease or public health area that interests you),
(Altobelli et al., 2009) measures the effect of socio-demographic, alcohol consumption smoking habits factors on hypertension, diabetes and obesity in psoriasis patients. The data has been collected through questionnaire from the sample size of 1376 patients from 21 Italian department of dermatology.
2. State the appropriate hypotheses to test for independence of content of interest.
The objective of the research is to know whether there is any relationship between socio-demographic and other risk factor with hypertension, diabetes and obesity in psoriasis patients. In order to address this question we are hereby proposing three hypothesis as stated below
a.) = There is no relationship between socio-demographic factors and hypertension, diabetes and obesity in psoriasis patients.
b.) = Consumption of alcohol does not have any association with hypertension, diabetes and obesity in psoriasis patients.
c.) = People who have smoking habits do not show any association with hypertension, diabetes and obesity in psoriasis patients.
3. copy the contingency table into your homework
    
    Psoriasis patients with hypertension§ No. Cases
    Psoriasis patients with hypertension§ No. Cases in %
    Psoriasis patients without hypertension§ No. Cases
    Psoriasis patients without hypertension§ No. Cases in %
    Psoriasis patients with Type 2 Diabetes No. Cases
    Psoriasis patients with Type 2 DiabetesNo. Cases in %
    Psoriasis patients without Type 2 DiabetesNo. Cases
    Psoriasis patients without Type 2 DiabetesNo. Cases in %
    Psoriasis patients with Obesity No. Cases
    Psoriasis patients with Obesity No. Cases in %
    Psoriasis patients without Obesity No. Cases
    Psoriasis patients without Obesity No. Cases in %
    Gender
    
    
    
    
    
    
    
    
    
    
    
    
    Males
    107
    60.1
    585
    48.8
    47
    48
    645
    50.5
    58
    40.4
    634
    51.4
    Females
    71
    39.9
    613
    51.2
    51
    52
    633
    49.5
    84
    59.6
    600
    48.6
    Age group (years)**
    
    
    
    
    
    
    
    
    
    
    
    
    ≤ 39
    11
    6.1
    444
    37.1
    8
    8.2
    447
    35
    35
    24.7
    420
    34
    40-59
    98
    55.1
    499
    41.6
    39
    40.2
    558
    43.6
    73
    51.4
    524
    42.5
    60+
    69
    38.8
    255
    21.3
    50
    43.6
    274
    21.4
    34
    23.9
    290
    23.5
    Marital status
    
    
    
    
    
    
    
    
    
    
    
    
    Not married
    49
    27.6
    533
    45.5
    58
    59.8
    736
    57.4
    83
    58.5
    711
    42.4
    Married
    129
    72.4
    665
    55.5
    39
    40.2
    543
    42.6
    59
    41.5
    523
    57.6
    Education
    
    
    
    
    
    
    
    
    
    
    
    
    Primary school
    54
    30.7
    293
    24.7
    26
    26.8
    321
    25.4
    36
    25.5
    311
    25.4
    Junior school
    63
    35.8
    510
    43
    30
    30.9
    543
    42.9
    64
    45.4
    509
    41.6
    High school
    23
    13.1
    206
    17.3
    11
    11.4
    218
    17.2
    18
    12.8
    211
    17.3
    University
    36
    20.4
    178
    15
    30
    30.9
    184
    14.5
    23
    16.3
    191
    15.6
    Occupational status
    
    
    
    
    
    
    
    
    
    
    
    
    Manual worker
    31
    17.7
    183
    15.6
    15
    15.6
    199
    15.9
    24
    17.3
    190
    15.7
    Office or professional...