Assigning output from awk to variables

I'm trying to create a bash script that ingests the output of another script cpu_latency.bt

The output of cpu_latency.bt is generated every second and looks similar to:

@usecs: 
[0]                    3 |@@@@@@@@@@                                          |
[1]                    5 |@@@@@@@@@@@@@@@@@                                   |
[2, 4)                 5 |@@@@@@@@@@@@@@@@@                                   |
[4, 8)                 0 |                                                    |
[8, 16)                5 |@@@@@@@@@@@@@@@@@                                   |
[16, 32)              15 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@|
[32, 64)               1 |@@@                                                 |
[64, 128)              0 |                                                    |
[128, 256)             1 |@@@                                                 |

@usecs: 
[0]                    1 |@@@                                                 |
[1]                    1 |@@@                                                 |
[2, 4)                 6 |@@@@@@@@@@@@@@@@@@@@@@                              |
[4, 8)                 2 |@@@@@@@                                             |
[8, 16)                4 |@@@@@@@@@@@@@@                                      |

I am trying to capture only the first number after the [ and then the number before the first | (so in the last line above that would be 8 and 4

The script below is fairly close (with the exception of handling [0] and [1] lines):

duration=10
while read line
do
        echo $line | cut -d "|" -f1 | sed 's/\[//g; s/\,//g; s/)//g' | awk '{print $1,$3}' |
        while read key value; do
                print "The Key is "$key "and the Value is "$value
        done

done < <(timeout $duration cpu_latency.bt | grep "\[")

However the output it returns is not quite right:

Error: no such file "The Key is 16"
Error: no such file "and the Value is 10"
Error: no such file "The Key is 16"
Error: no such file "and the Value is 9"

Can recommend a better way of assigning the output of $1 and $3 to variables so I can write them out to a file?

Thanks CiCa

@RavinderSingh13 I'm not sure if I I'm misunderstanding how I can use an array for this, but a little more work with a while loop has gotten me considerably closer to what I'm aiming for:

while read key value
do  
    echo `hostname`".cpu-lat."$key"\\"$value"\\`date +"%s"`"  >> /tmp/stats.out
done < <(
timeout $duration /root/bpftrace/cpu_latency.bt | awk '
match($0,/^\[[0-9]+/){
  val=substr($0,RSTART+1,RLENGTH-1)
  match($0,/[0-9]+ +\|/)
  val2=substr($0,RSTART,RLENGTH)
  sub(/ +\|/,"",val2)
  print val,val2
  val=val2=""
}' )