+-------+-------------------+
| std   | R Documentation   |
+-------+-------------------+

data from Section 1.12
----------------------

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

The ``std`` data frame has 877 rows and 3 columns.

Format
~~~~~~

This data frame contains the following columns:

obs
    Observation number

race
    Race (W=white, B=black)

marital
    Marital status (D=divorced / separated, M=married, S=single)

age
    AGE

yschool
    Years of schooling

iinfct
    Initial infection (1= gonorrhea, 2=chlamydia, 3=both)

npartner
    Number of partners

os12m
    Oral sex within 12 months (1=yes, 0=no)

os30d
    Oral sex within 30 days (1=yes, 0=no)

rs12m
    Rectal sex within 12 months (1=yes, 0=no)

rs30d
    Rectal sex within 30 days (1=yes, 0=no)

abdpain
    Presence of abdominal pain (1=yes, 0=no)

discharge
    Sign of discharge (1=yes, 0=no)

dysuria
    Sign of dysuria (1=yes, 0=no)

condom
    Condom use (1=always, 2=sometime, 3=never)

itch
    Sign of itch (1=yes, 0=no)

lesion
    Sign of lesion (1=yes, 0=no)

rash
    Sign of rash (1=yes, 0=no)

lymph
    Sign of lymph (1=yes, 0=no)

vagina
    Involvement vagina at exam (1=yes, 0=no)

dchexam
    Discharge at exam (1=yes, 0=no)

abnode
    Abnormal node at exam (1=yes, 0=no)

rinfct
    Reinfection (1=yes, 0=no)

time
    Time to reinfection

Source
~~~~~~

Klein and Moeschberger (1997) *Survival Analysis Techniques for Censored
and truncated data*, Springer.

Examples
~~~~~~~~

::

    data(std)

