Data on seizure counts for 59 epileptics.
Source: Table 2 (page 664) in Thall and Vail (1990).
With permission of Blackwell Publishing.
Reference: Thall, P.F. and Vail, S.C. (1990). Some covariance models for
longitudinal count data with overdispersion. Biometrics, 46, 657-671,
Description:
The data are from a placebo-controlled clinical trial of 59 epileptics.
Patients with partial seizures were enrolled in a randomized
clinical trial of the anti-epileptic drug, progabide. Participants
in the study were randomized to either progabide or a placebo, as
an adjuvant to the standard anti-epileptic chemotherapy. Progabide
is an anti-epileptic drug whose primary mechanism of action is to
enhance gamma-aminobutyric acid (GABA) content; GABA is the
primary inhibitory neurotransmitter in the brain.
Prior to receiving treatment, baseline data on the number of
epileptic seizures during the preceding 8-week interval were
recorded. Counts of epileptic seizures during 2-week intervals
before each of four successive post-randomization clinic visits
were recorded.
Variable List:
Patient ID, Treatment (0=Placebo, 1=Progabide), Age,
Baseline 8 week seizure count, First 2 week seizure count,
Second 2 week seizure count, Third 2 week seizure count,
Fourth 2 week seizure count.
1 0 31 11 5 3 3 3
2 0 30 11 3 5 3 3
3 0 25 6 2 4 0 5
4 0 36 8 4 4 1 4
5 0 22 66 7 18 9 21
6 0 29 27 5 2 8 7
7 0 31 12 6 4 0 2
8 0 36 52 40 20 23 12
9 0 37 23 5 6 6 5
10 0 28 10 14 13 6 0
11 0 36 52 26 12 6 22
12 0 24 33 12 6 8 5
13 0 28 18 4 4 6 2
14 0 36 42 7 9 12 14
15 0 26 87 16 24 10 9
16 0 26 50 11 0 0 5
17 0 28 18 0 0 3 3
18 0 31 111 37 29 28 29
19 0 32 18 3 5 2 5
20 0 21 20 3 0 6 7
21 0 29 12 3 4 3 4
22 0 21 9 3 4 3 4
23 0 32 17 2 3 3 5
24 0 25 28 8 12 2 8
25 0 30 55 18 24 76 25
26 0 40 9 2 1 2 1
27 0 19 10 3 1 4 2
28 0 22 47 13 15 13 12
29 1 18 76 11 14 9 8
30 1 32 38 8 7 9 4
31 1 20 19 0 4 3 0
32 1 20 10 3 6 1 3
33 1 18 19 2 6 7 4
34 1 24 24 4 3 1 3
35 1 30 31 22 17 19 16
36 1 35 14 5 4 7 4
37 1 57 11 2 4 0 4
38 1 20 67 3 7 7 7
39 1 22 41 4 18 2 5
40 1 28 7 2 1 1 0
41 1 23 22 0 2 4 0
42 1 40 13 5 4 0 3
43 1 43 46 11 14 25 15
44 1 21 36 10 5 3 8
45 1 35 38 19 7 6 7
46 1 25 7 1 1 2 4
47 1 26 36 6 10 8 8
48 1 25 11 2 1 0 0
49 1 22 151 102 65 72 63
50 1 32 22 4 3 2 4
51 1 25 42 8 6 5 7
52 1 35 32 1 3 1 5
53 1 21 56 18 11 28 13
54 1 41 24 6 3 4 0
55 1 32 16 3 5 4 3
56 1 26 22 1 23 19 8
57 1 21 25 2 3 0 1
58 1 36 13 0 0 0 0
59 1 37 12 1 4 3 2
Hi,
Imtrying to convert this file to long format using data steps, but I cant since it shows that theres only one variable and 94 observations. Please, how can I give a variable name for each of the columns?
