Clustering of adverse events. An investigation was prompted when the U.S. Food and Drug Administration received a report of an increased frequency of an adverse drug-related event after a hospital switched from the innovator company’s product to a generic product. To address this issue, a team of investigators completed chart reviews of patients who had received the drugs in question. Table lists data for the first 25 patients in the study.
Table First 25 observations from a study of cerebellar toxicity.
I | AGE | SEX | MANUF | DIAG | STAGE | TOX | DOSE | SCR | WEIGHT | GENERIC |
1 | 50 | 1 | J | 1 | 1 | 1 | 36.0 | 0.8 | 66 | 1 |
2 | 21 | 1 | J | 1 | 2 | 2 | 29.0 | 1.1 | 68 | 1 |
3 | 35 | 1 | J | 2 | 2 | 2 | 16.2 | 0.7 | 97 | 1 |
4 | 49 | 2 | S | 1 | 1 | 2 | 29.0 | 0.8 | 83 | 2 |
5 | 38 | 1 | J | 2 | 2 | 1 | 16.2 | 1.4 | 97 | 1 |
6 | 42 | 1 | S | 2 | 2 | 2 | 18.0 | 1.0 | 82 | 2 |
7 | 17 | 1 | J | 1 | 2 | 2 | 17.4 | 1.0 | 64 | 1 |
8 | 20 | 1 | S | 2 | 2 | 2 | 17.4 | 1.0 | 73 | 2 |
9 | 49 | 2 | J | 1 | 1 | 2 | 37.2 | 0.7 | 103 | 1 |
10 | 41 | 2 | J | 1 | 2 | 2 | 18.6 | 0.9 | 58 | 1 |
11 | 20 | 1 | S | 2 | 2 | 2 | 18.0 | 1.1 | 113 | 2 |
12 | 55 | 1 | S | 1 | 1 | 2 | 36.0 | 0.8 | 87 | 2 |
13 | 44 | 2 | J | 1 | 1 | 1 | 22.4 | 1.2 | 59 | 1 |
14 | 23 | 1 | S | 2 | 2 | 2 | 39.6 | 0.8 | 83 | 2 |
15 | 64 | 2 | S | 1 | 1 | 2 | 30.0 | 0.9 | 69 | 2 |
16 | 65 | 1 | S | 1 | 1 | 1 | 23.2 | 1.7 | 106 | 2 |
17 | 23 | 2 | S | 1 | 2 | 2 | 16.8 | 0.9 | 66 | 2 |
18 | 44 | 1 | S | 1 | 2 | 2 | 17.4 | 1.0 | 84 | 2 |
19 | 29 | 2 | S | 2 | 1 | 2 | 18.0 | 0.7 | 56 | 2 |
20 | 32 | 1 | S | 1 | 2 | 2 | 18.0 | 1.0 | 84 | 2 |
21 | 18 | 1 | S | 2 | 2 | 2 | 17.4 | 0.9 | 70 | 2 |
22 | 22 | 1 | S | 1 | 1 | 1 | 26.1 | 1.7 | 69 | 2 |
23 | 43 | 2 | J | 2 | 2 | 2 | 18.0 | 0.8 | 63 | 1 |
24 | 39 | 2 | S | 1 | 2 | 2 | 18.0 | 0.9 | 55 | 2 |
25 | 38 | 2 | J | 1 | 1 | 1 | 16.0 | 1.0 | 112 | 1 |
Here’s a codebook for the data:
Variable | Description |
AGE | Age (years) |
SEX | 1 = male; 2 = female |
MANUF | Manufacturer of the drug: Smith or Jones |
DIAG | Underling diagnosis: 1 = leukemia; 2 = lymphoma |
STAGE | Stage of disease: 1 = relapse; 2 = remission |
TOX | Did cerebellar toxicity occur?: 1 = yes; 2 = no |
DOSE | Dose of drug (g/m2) |
SCR | Serum creatinine (mg/dl) |
WEIGHT | Body weight (kg) |
GENERIC | Generic drug: 1 = yes; 2 = no |
(a) Classify each variable in the table as either quantitative, ordinal, or categorical.
(b) What is the value of the age variable for observation 4?
(c) What is the value of the diag (diagnosis) variable for observation 2?
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.