M_SURGE : Unequal time intervals

questions concerning analysis/theory using programs M-SURGE, E-SURGE and U-CARE

M_SURGE : Unequal time intervals

Postby Giacomo Tavecchia » Wed Jan 18, 2006 1:46 pm

Hi,

I am using the "unequal time intervals" -option in M_SURGE.
I have three simple questions that I hope of general interest:

1) Does this option work for the singlesite case?
According to the manual yes, but the “Readme” file seems to tell the opposite.

2) Once I have uploaded the file with the length of each interval, does this appear somewhere in outputs and/or windows?
...just to double check that the file is been uploaded correctly...

3) Say parameters 1, 2, and 3 refer to the survival over three intervals of length L, 2L and L, respectively. In the output file the value of parameter 2 refers to a "L-inverval" or is squared (for a 2L-interval)?

Thank you very much for all the work and helps.
Giacomo
Giacomo Tavecchia
 
Posts: 1
Joined: Wed Jan 18, 2006 12:12 pm

Postby CHOQUET » Thu Jan 19, 2006 6:02 am

About using "unequal time intervals" -option in M_SURGE.

>> 1) Does this option work for the singlesite case?

YES

>> According to the manual yes, but the “Readme” file seems to tell the opposite.

I think that the readme is clear. (<<Unequal time intervals can be used now in a few cases: in single state models, and in multistate models where they are accounted for only for survival (not yet for transition probabilities)>>)

> 2) Once I have uploaded the file with the length of each interval, does > this appear somewhere in outputs and/or windows?
> ...just to double check that the file is been uploaded correctly...

When lengths of time interval are loaded then M-SURGE checks the
number of time interval. If this number is valid then the sub-menu "unequal time interval" is checked. To unchecked "unequal time interval", just select the sub-menu "unequal time interval". Output is perhaps a point which can be improved in the next version because there is no information about unequal time interval.

> 3) Say parameters 1, 2, and 3 refer to the survival over three intervals > of length L, 2L and L, respectively. In the output file the value of
> parameter 2 refers to a "L-inverval" or is squared (for a 2L-interval)?

Parameter 2 refer to a L-interval (see the manual p 9)

Rémi
CHOQUET
 
Posts: 211
Joined: Thu Nov 24, 2005 4:58 am
Location: CEFE, Montpellier, FRANCE.


Return to analysis help

Who is online

Users browsing this forum: No registered users and 18 guests