rownames,number,treat,age
1,63,placebo,20
2,2,drug,16
3,28,placebo,18
4,17,drug,22
5,61,placebo,13
6,1,drug,23
7,7,placebo,34
8,15,placebo,50
9,44,placebo,19
10,25,drug,17
11,3,drug,23
12,28,placebo,22
13,10,placebo,30
14,40,placebo,27
15,33,drug,23
16,46,placebo,22
17,50,placebo,34
18,3,drug,23
19,1,drug,22
20,4,drug,42