+-------+-------------------+
| uis   | R Documentation   |
+-------+-------------------+

UIS Drug Treatment study data
-----------------------------

Description
~~~~~~~~~~~

There are 628 data points in the original data, 575 of which have no
missing values.

Variable descriptions:

+------------+-----------------------------------+----------------------------------+
| Variable   | Description                       | Codes/Values                     |
+------------+-----------------------------------+----------------------------------+
| ID         | Identification Code               | 1 - 628                          |
+------------+-----------------------------------+----------------------------------+
| AGE        | Age at Enrollment                 | Years                            |
+------------+-----------------------------------+----------------------------------+
| BECK       | Beck DepressionScore              | 0.000 - 54.000                   |
+------------+-----------------------------------+----------------------------------+
| HC         | Heroin/Cocaine Use During         | 1 = Heroin & Cocaine             |
+------------+-----------------------------------+----------------------------------+
|            | 3 Months Prior to Admission       | 2 = Heroin Only                  |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 3 = Cocaine Only                 |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 4 = Neither Heroin nor Cocaine   |
+------------+-----------------------------------+----------------------------------+
| IV         | History of IV Drug Use            | 1 = Never                        |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 2 = Previous                     |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 3 = Recent                       |
+------------+-----------------------------------+----------------------------------+
| NDT        | Number of Prior Drug Treatments   | 0 - 40                           |
+------------+-----------------------------------+----------------------------------+
| RACE       | Subject's Race                    | 0 = White                        |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 1 = Non-White                    |
+------------+-----------------------------------+----------------------------------+
| TREAT      | Treatment Randomization           | 0 = Short                        |
+------------+-----------------------------------+----------------------------------+
|            | Assignment                        | 1 = Long                         |
+------------+-----------------------------------+----------------------------------+
| SITE       | Treatment Site                    | 0 = A                            |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 1 = B                            |
+------------+-----------------------------------+----------------------------------+
| LEN.T      | Length of Stay in Treatment       | Days                             |
+------------+-----------------------------------+----------------------------------+
|            | (Admission Date to Exit Date)     |                                  |
+------------+-----------------------------------+----------------------------------+
| TIME       | Time to Drug Relapse              | Days                             |
+------------+-----------------------------------+----------------------------------+
|            | (Measured from Admission Date)    |                                  |
+------------+-----------------------------------+----------------------------------+
| CENSOR     | Event for Treating Lost to        | 1 = Returned to Drugs            |
+------------+-----------------------------------+----------------------------------+
|            | Follow-Up as Returned to Drugs    | or Lost to Follow-Up             |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 0 = Otherwise                    |
+------------+-----------------------------------+----------------------------------+
| Y          | log of TIME                       |                                  |
+------------+-----------------------------------+----------------------------------+
| ND1        | Component of NDT                  |                                  |
+------------+-----------------------------------+----------------------------------+
| ND2        | Component of NDT                  |                                  |
+------------+-----------------------------------+----------------------------------+
| LNDT       |                                   |                                  |
+------------+-----------------------------------+----------------------------------+
| FRAC       | Compliance fraction               | LEN.T/90 for short trt           |
+------------+-----------------------------------+----------------------------------+
|            |                                   | LEN.T/180 for long trt           |
+------------+-----------------------------------+----------------------------------+
| IV3        | Recent IV use                     | 1 = Yes                          |
+------------+-----------------------------------+----------------------------------+
|            |                                   | 0 = No                           |
+------------+-----------------------------------+----------------------------------+

Usage
~~~~~

::

    data(uis)

Format
~~~~~~

A data frame with dimension 575 by 18.

Source
~~~~~~

Table 1.3 of Hosmer,D.W. and Lemeshow, S. (1998)

References
~~~~~~~~~~

Hosmer,D.W. and Lemeshow, S. (1998) Applied Survival Analysis:
Regression Modeling of Time to Event Data, John Wiley and Sons Inc., New
York, NY
