armd0 {nlmeU} | R Documentation |
armd0 Data (1107 x 8)
Description
Data from Age-Related Macular Degeneration (ARMD) clinical trial
Format
The armd0
data frame has 1107 rows and 8 columns. It contains data for n=240 subjects
stored in a long format with up to five rows for one subject.
- subject
-
a factor with 240 levels
1
,2
,3
,4
,5
, ... - treat.f
-
a factor with 2 levels
Placebo
,Active
- visual0
-
an integer vector with values from 20 to 85
- miss.pat
-
a factor with 9 levels
----
,---X
,--X-
,--XX
,-XX-
, ... - time.f
-
a factor with 5 levels
Baseline
,4wks
,12wks
,24wks
,52wks
- time
-
a numeric vector with values from 0 to 52
- visual
-
an integer vector with values from 3 to 85
- tp
-
a numeric vector with values from 0 to 4
Details
The ARMD data arise from a randomized multi-center clinical trial comparing an experimental treatment (interferon-alpha) versus placebo for patients diagnosed with ARMD.
Source
Pharmacological Therapy for Macular Degeneration Study Group (1997). Interferon alpha-IIA is ineffective for patients with choroidal neovascularization secondary to age-related macular degeneration. Results of a prospective randomized placebo-controlled clinical trial. Archives of Ophthalmology, 115, 865-872.