|
Match Algorithm
|
Age Caliper
|
GCP Caliper
|
Number of Pairs
|
Mean Distance
|
Sum of Distance
|
|---|
|
Greedy
|
1
|
1
|
7
|
0.99
|
6.90
|
|
Optimal
|
1
|
1
|
7
|
0.99
|
6.90
|
|
Greedy
|
2
|
2
|
21
|
1.79
|
37.51
|
|
Optimal
|
2
|
2
|
21
|
1.76
|
36.89
|
|
Greedy
|
3
|
3
|
26
|
2.06
|
53.63
|
|
Optimal
|
3
|
3
|
26
|
2.05
|
53.48
|
|
Greedy
|
4
|
4
|
32
|
2.68
|
85.81
|
|
Optimal
|
4
|
4
|
34
|
2.99
|
101.7
|
|
Greedy
|
5*
|
5
|
34
|
3.01
|
102.45
|
|
Optimal
|
5*
|
5
|
39
|
3.79
|
147.79
|
- *Caliper is defined to be the minimum allowable difference between the case and the control. In our study, we used a caliper of five for age and GCP, and zero for the other four categorical variables
-
GCP general cognitive performance
