. tab date_patologi

Date of PA |
examination | Freq. Percent Cum.
------------+-----------------------------------
01apr2015 | 1 2.50 2.50
15may2015 | 1 2.50 5.00
29may2015 | 1 2.50 7.50
07jul2015 | 1 2.50 10.00
07aug2015 | 1 2.50 12.50
19oct2015 | 1 2.50 15.00
14dec2015 | 1 2.50 17.50
18dec2015 | 1 2.50 20.00
28dec2015 | 1 2.50 22.50
18jan2016 | 1 2.50 25.00
29jan2016 | 1 2.50 27.50
11feb2016 | 1 2.50 30.00
19feb2016 | 1 2.50 32.50
23feb2016 | 1 2.50 35.00
02mar2016 | 1 2.50 37.50
15mar2016 | 1 2.50 40.00
31mar2016 | 1 2.50 42.50
12apr2016 | 1 2.50 45.00
13apr2016 | 1 2.50 47.50
19may2016 | 1 2.50 50.00
04jun2016 | 1 2.50 52.50
08jun2016 | 1 2.50 55.00
09jun2016 | 1 2.50 57.50
02sep2016 | 1 2.50 60.00
05sep2016 | 1 2.50 62.50
10oct2016 | 1 2.50 65.00
14oct2016 | 1 2.50 67.50
23oct2016 | 1 2.50 70.00
28oct2016 | 1 2.50 72.50
13dec2016 | 1 2.50 75.00
02jan2017 | 1 2.50 77.50
18jan2017 | 1 2.50 80.00
22feb2017 | 1 2.50 82.50
07mar2017 | 1 2.50 85.00
23mar2017 | 1 2.50 87.50
11apr2017 | 1 2.50 90.00
02may2017 | 1 2.50 92.50
03may2017 | 1 2.50 95.00
05jun2017 | 1 2.50 97.50
08jun2017 | 1 2.50 100.00
------------+-----------------------------------
Total | 40 100.00

. tab fu

Date at the |
last of |
follow-up | Freq. Percent Cum.
------------+-----------------------------------
09sep2015 | 1 2.50 2.50
15nov2015 | 1 2.50 5.00
17may2016 | 1 2.50 7.50
11jul2016 | 1 2.50 10.00
15jul2016 | 1 2.50 12.50
19jul2016 | 1 2.50 15.00
08sep2016 | 1 2.50 17.50
10sep2016 | 1 2.50 20.00
07oct2016 | 1 2.50 22.50
24oct2016 | 1 2.50 25.00
22nov2016 | 1 2.50 27.50
25nov2016 | 1 2.50 30.00
14dec2016 | 1 2.50 32.50
15dec2016 | 1 2.50 35.00
13mar2017 | 2 5.00 40.00
24mar2017 | 1 2.50 42.50
14jun2017 | 1 2.50 45.00
18jun2017 | 1 2.50 47.50
03jul2017 | 1 2.50 50.00
07jul2017 | 1 2.50 52.50
10jul2017 | 1 2.50 55.00
11jul2017 | 9 22.50 77.50
12jul2017 | 7 17.50 95.00
13jul2017 | 2 5.00 100.00
------------+-----------------------------------
Total | 40 100.00

. gen weeks= date_patologi - event

. tab weeks

weeks | Freq. Percent Cum.
------------+-----------------------------------
20178 | 1 2.50 2.50
20221 | 1 2.50 5.00
20236 | 1 2.50 7.50
20275 | 1 2.50 10.00
20306 | 1 2.50 12.50
20379 | 1 2.50 15.00
20434 | 1 2.50 17.50
20439 | 1 2.50 20.00
20449 | 1 2.50 22.50
20469 | 1 2.50 25.00
20480 | 1 2.50 27.50
20495 | 1 2.50 30.00
20503 | 1 2.50 32.50
20506 | 1 2.50 35.00
20514 | 1 2.50 37.50
20526 | 1 2.50 40.00
20543 | 1 2.50 42.50
20554 | 1 2.50 45.00
20556 | 1 2.50 47.50
20592 | 1 2.50 50.00
20609 | 1 2.50 52.50
20612 | 2 5.00 57.50
20699 | 1 2.50 60.00
20701 | 1 2.50 62.50
20735 | 1 2.50 65.00
20739 | 1 2.50 67.50
20750 | 1 2.50 70.00
20754 | 1 2.50 72.50
20801 | 1 2.50 75.00
20821 | 1 2.50 77.50
20837 | 1 2.50 80.00
20871 | 1 2.50 82.50
20885 | 1 2.50 85.00
20901 | 1 2.50 87.50
20919 | 1 2.50 90.00
20941 | 1 2.50 92.50
20942 | 1 2.50 95.00
20975 | 1 2.50 97.50
20977 | 1 2.50 100.00
------------+-----------------------------------
Total | 40 100.00

and the result come out like that, how can i make it 1 week etc?