This data of 316 patients who survived the fire, each patient was measured at 3, 6 and 12 months after the fire.
data(PTSD)Patient number
Self-control (A numeric vector)
The number of life problems ( A numeric vector )
The number of stress events ( A numeric vector )
Family cohesion ( A numeric vector )
Measured at 3, 6 and 12 months after the fire ( 1 : 3 months, 2 : 6 months, 3 : 12 months )
Post traumatic stress disorder, Outcome variable ( Categorical vector ) ( 0 : No, 1 : Yes)
Control, problems, and stress were divided into upper and lower levels based on 3, and cohesion was divided into upper and lower levels based on 6. ( 0 : Low, 1 : high ) A data frame with 948 rows and 7 variables
| subject | control | problems | stress | cohesion | time | ptsd | |
| 1 | 15 | 3.22 | 5.62 | 1 | 8 | 1 | 0 |
| 2 | 15 | 3.17 | 5.38 | 0 | 8 | 2 | 0 |
| 3 | 15 | 3.28 | 3.75 | 1 | 8 | 3 | 0 |
| 4 | 18 | 2.56 | 9.25 | 0 | 8 | 1 | 1 |
| 5 | 18 | 3.44 | 4.38 | 0 | 8 | 2 | 0 |
| 6 | 18 | 3.33 | 2.38 | 0 | 8 | 3 | 0 |
| 7 | 19 | 2.72 | 7.75 | 1 | 8 | 1 | 1 |
| 8 | 19 | 2.78 | 7.75 | 1 | 7 | 2 | 1 |
| 9 | 19 | 2.78 | 7.50 | 1 | 7 | 3 | 0 |
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| 943 | 570 | 3.72 | 2.75 | 0 | 7 | 1 | 0 |
| 944 | 570 | 3.89 | 2.25 | 0 | 7 | 2 | 0 |
| 945 | 570 | 3.67 | 1.25 | 0 | 7 | 3 | 0 |
| 946 | 571 | 3.56 | 3.00 | 0 | 7 | 1 | 0 |
| 947 | 571 | 2.94 | 1.88 | 0 | 7 | 2 | 0 |
| 948 | 571 | 3.50 | 2.75 | 0 | 7 | 3 | 0 |
Allison, P. D. (2001). Logistic Regression Using the SAS System, Theory and Application. SAS Institute Inc.