ICU_TypePubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 1 of 12 PubHlth 540 - Introduction to Biostatistics 1. Summarizing Data Illustration: Online Computing Resources Introduction: The world wide web has many resources for statistical description and analysis that are free and easy to use. This illustration includes demonstrations of the following: Preliminary – How to Screen Capture (for PC Users and MAC Users) (1) Numerical Summaries using the Vassar Stats Statistical Computation Website (2) Bar Graph using the Vassar Stats Statistical Computation Website (3) Stem and Leaf Diagram using the Shodor site (4) Histogram using the Shodor site. (5) Box Plot using the Shodor site These are not the only sites of course. Have a look for yourself! Data are from PubHlth 540 1. Summarizing Data, page 13. This data set contains information on n=25 consecutive patients admitted to intensive care at a large urban hospital. Coding Manual Variable Coding • Age (in years) • Type of Admission • ICU Type • Systolic Blood Pressure (in millimeters of mercury) • Number of Days Spent in ICU • Vital Status at Hospital Discharge • numeric • 1= Emergency 0= Elective • 1= Medical 2= Surgical 3= Cardiac 4= Other • numeric • numeric • 1= Dead 0= AlivePubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 2 of 12 Data: ID Age Type_Adm ICU_Type SBP ICU_LOS Vit_Stat 1 15 1 1 100 4 0 2 31 1 2 120 1 0 3 75 0 1 140 13 1 4 52 0 1 110 1 0 5 84 0 4 80 6 0 6 19 1 1 130 2 0 7 79 0 1 90 7 0 8 74 1 4 60 1 1 9 78 0 1 90 28 0 10 76 1 1 130 7 0 11 29 1 2 90 13 0 12 39 0 2 130 1 0 13 53 1 3 250 11 0 14 76 1 3 80 3 1 15 56 1 3 105 5 1 16 85 1 1 145 4 0 17 65 1 1 70 10 0 18 53 0 2 130 2 0 19 75 0 3 80 34 1 20 77 0 1 130 20 0 21 52 0 2 210 3 0 22 19 0 1 80 1 1 23 34 0 3 90 3 0 24 56 0 1 185 3 1 25 71 0 2 140 1 1 Frequency Table Summary of Distribution of ICU_TYPE ICU_Type Frequency (“how often”) Relative Frequency (“proportionately often”) Medical 12 0.48 Surgical 6 0.24 Cardiac 5 0.20 Other 2 0.08 TOTAL 25 1.00PubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 3 of 12 Preliminary – How to Screen Capture It is very handy to know how to “photo capture” your screen for pasting into a document elsewhere, such as a word document. A google search will yield several hits. These are from the Shodor website. For PC UsersPubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 4 of 12 For MAC UsersPubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 5 of 12 (1) Numerical Summaries using the Vassar Stats Statistical Computation Website Illustration for variable: AGE 1. Launch http://faculty.vassar.edu/lowry/VassarStats.html 2. At menu bar on left: Miscellanea 3. From selections, choose: Basic Sample Stats 4. Enter the 25 values of AGE into the data entry box. Tips (1) Press the enter key after each data item, except for (2) do NOT press the enter key after the last data item.PubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 6 of 12 5. Click: calculate. You should then see:PubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 7 of 12 (2) Bar Chart using the Vassar Stats Statistical Computation Website Illustration for variable: ICU_TYPE 1. Launch http://faculty.vassar.edu/lowry/VassarStats.html 2. At menu bar on left: Utilities 3. From selections, choose: Simple Graph Maker 4. To make a bar chart, scroll down and provide entries for Columns: Set this equal to the number of possible outcomes Graph label: Provide a title of your bar chart Y axis label: Indicate what is being plotted (# or %) Column Value: Enter frequencies Column Label: Enter abbreviated value codes for the ICU_TYPE X axis label: Be sure to define the variable you are summarizingPubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 8 of 12 5. Click: make graph. You should then see:PubHtlh 540 – marizing Data Illustration: Online Computing Resources Fall 2011 1. Sum Z:\bigelow\teaching\web540\stata\illustration_summarizing_online.doc Page 9 of 12 (3) Stem and Leaf Diagram using the Shodor Website Illustration for variable: AGE 1. Launch http://www.shodor.org/interactivate/activities/StemAndLeafPlotter/ 2. At box titled title: Enter title. Then click on set 3. In box titled Enter data: enter your data values one row at a time 4. Click: update plot. You should then see:PubHtlh 540 – marizing