Table:
variables
< 1993
≥ 1993
difference
confidence interval

age
40.4
35.1
-5.3
(-5.6, -5.1

sex
45.0
47.4
2.4
(-3.7, 8.4

married
44.7
38.4
-6.4
(-13.9, 1.2

common-law
26.7
28.8
2.1
(-3.7, 7.8

separated/divorced/widowed
12.1
5.5
-6.6
(-10.0, -3.2

single
16.4
27.3
10.9
(3.8, 17.9

age, first marriage
27.6
27.6
0.0
(-0.7, 0.7

age, first marriage/union
26.5
25.8
-0.8
(-1.4, -0.1

age, first child
29.5
28.8
-0.7
(-1.6, 0.1

household size
3.3
3.2
-0.1
(-0.3, 0.1

includes 3 generations or more
1.8
3.3
1.5
(-0.2, 3.3

includes 2 generations or less
85.5
79.5
-5.9
(-13.0, 1.2

person not in a census family
12.8
17.2
4.4
(-2.6, 11.4

single detached house
77.2
67.2
-10.1
(-17.9, -2.2

atlantic
7.4
7.4
0.0
(-1.9, 2.0

quebec
23.1
26.4
3.2
(-1.5, 8.0

ontario
36.6
35.8
-0.7
(-8.0, 6.5

prairies
20.2
17.6
-2.6
(-7.2, 1.9

bc
12.6
12.8
0.1
(-3.9, 4.1

rural area
18.6
17.0
-1.7
(-6.2, 2.9

aboriginal person
2.4
2.5
0.0
(-1.5, 1.6

own education: less than high school
7.2
5.3
-1.9
(-4.7, 0.9

own education: high school
15.8
17.4
1.6
(-3.2, 6.4

own education: trade/vocational/apprenticeship
11.8
10.0
-1.8
(-5.1, 1.5

own education: some postsecondary
30.6
30.7
0.1
(-6.5, 6.7

own education: bachelor or above
34.4
35.9
1.5
(-4.9, 8.0

health: very good/excellent
66.3
68.6
2.2
(-4.4, 8.9

health: good
26.2
26.6
0.4
(-5.8, 6.5

health: fair/poor
7.4
4.8
-2.6
(-5.6, 0.4

employed
88.8
86.2
-2.5
(-6.4, 1.3

self-employed
13.9
13.7
-0.2
(-4.4, 4.0

living with both parents at birth
98.4
95.8
-2.6
(-4.5, -0.7

living with both parents at 15
84.0
79.8
-4.2
(-9.1, 0.7

mother education: less than high school
24.6
19.2
-5.4
(-10.9, 0.2

mother education: high school
32.3
30.5
-1.8
(-8.5, 4.8

mother education: some postsecondary
26.7
28.8
2.1
(-3.6, 7.7

mother education: university
12.5
19.8
7.2
(1.9, 12.6

father education: less than high school
28.0
22.9
-5.1
(-11.4, 1.2

father education: high school
21.2
21.9
0.7
(-4.3, 5.7

father education: some postsecondary
23.9
28.5
4.6
(-2.1, 11.4

father education: university
23.9
24.4
0.5
(-5.0, 6.1

visible minority
7.4
11.4
4.0
(-2.3, 10.3

born in canada, canadian-born parents
66.7
70.9
4.2
(-2.7, 11.1

foreign-born
8.4
9.1
0.6
(-2.9, 4.1

born in canada, at least one foreign-born parent
24.8
20.0
-4.8
(-11.7, 2.0

number
720
1133
..
..

Statement: those for whom a parent-child link was established before 1993 are on average 5.3 years older.
Question: what is the difference between link established before 1993 and linked in 1993 or after?
Answer: [5.3]