IN generating the timevariabel for a cox model I get the follwing.
Everything is perfect, except id 83. Any idea why??
gen futime=fudate-opdate
gen pfutime=pfudate-opdate
gen coxtime=pfutime if pfutime>futime &pfutime<.
replace coxtime=futime if pfutime==.
replace coxtime=pfutime if futime==.
list opdate fudate pfudate futime pfutime coxtime
| opdate fudate pfudate futime pfutime coxtime |
76. | 10 Nov 04 18 Apr 05 23 May 08 159 1290 1290 |
77. | 25 May 04 16 Sep 04 23 May 08 114 1459 1459 |
78. | 24 Aug 04 01 Dec 04 30 Jun 08 99 1406 1406 |
79. | 28 Feb 05 22 Sep 05 26 Jun 08 206 1214 1214 |
80. | 06 Jan 05 13 Apr 05 15 Oct 08 97 1378 1378 |
|----------------------------------------------------------------|
81. | 10 Jan 05 18 Apr 05 15 Sep 08 98 1344 1344 |
82. | 14 Apr 05 06 Jun 05 25 Jun 08 53 1168 1168 |
83. | 22 Jun 05 04 Oct 05 24 Jun 08 -72944 -71950 -71950 |
84. | 15 Jan 87 10 Feb 96 . 3313 . 3313 |
85. | 31 Aug 92 20 Mar 94 . 566 . 566 |
|----------------------------------------------------------------|
Regards,
Moleps
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