I was interested in looking at types of injuries (fracture vs soft-tissue) in pediatric population, sustained from a bicycle-related accident. I have divided the age into 3 groups and the relative frequencies of their events (attached image).
How can I determine that the increase in fracture in age group 13-18 is statistically greater compared to others? For age group 7-12 when compared to age group 0-6, etc?
Someone mentioned to use chi square, but I don't know how to set up that table in SPSS. If someone could help, that'd be very kind of you!
Hello Anand,
The two most likely methods would be: Chi-square test of independence or Log-linear analysis.
Setting up the data would be similar in each case:
One variable (column) for age groups (you would have three different values appearing in this column).
A second variable for injury type (you would have two different values appearing in this column).
A third variable for frequency (how often each age group/injury type combination was observed).
In IBM SPSS, be sure to use Data/Weight Cases/Weight cases by the Frequency variable.
For the Chi-square: Analyze/Descriptive/Crosstabs, and check the box for Chi-square test after naming the row (age group) and column (injury type) variables.
Good luck with your work!
Suggest you start by counting some things. Can you make tables or graphs. Best, D. Booth
With 3 data points (from your classification system) about all you can do is report the order of the total by group. If you have more information from the original data collection, you might follow up on Dr. Morse's suggestion. Best, D. Booth
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