Table:
characteristics
total singleton births
small-for-gestational-age
preterm

number
%
95% confidence interval
rate per 100 births
95% confidence interval
rate per 100 births
95% confidence interval

from
to
from
to
from
to

total
127,694
100.0
..
..
8.2
8.1
8.4
6.4
6.3
6.5

child sex

male
65,324
51.4
51.2
51.5
8.4
8.2
8.6
6.9
6.7
7.1

female
62,370
48.6
48.5
48.8
8.1
7.9
8.3
5.9
5.7
6.1

child birth year

2004
39,791
31.2
31.0
31.3
8.0
7.8
8.3
6.5
6.3
6.8

2005
63,815
50.2
50.1
50.4
8.3
8.0
8.5
6.4
6.2
6.6

2006
24,088
18.6
18.5
18.7
8.5
8.1
8.9
6.3
6.0
6.7

maternal age group

younger than 20
6,162
4.0
4.0
4.1
10.8
9.8
11.9
8.4
7.6
9.3

20 to 24
21,162
16.2
16.1
16.3
9.6
9.1
10.1
6.5
6.1
6.9

25 to 29
39,353
31.1
30.9
31.2
8.1
7.8
8.4
6.0
5.7
6.3

30 to 34
39,386
31.5
31.3
31.6
7.4
7.2
7.7
6.1
5.8
6.3

35 to 39
18,033
14.3
14.2
14.4
8.1
7.7
8.5
6.7
6.3
7.1

40 or older
3,598
2.9
2.9
3.0
8.4
7.4
9.5
9.8
8.8
10.9

live birth order

first
56,055
46.5
46.2
46.8
10.5
10.2
10.7
7.3
7.1
7.6

second
44,301
35.3
35.0
35.5
6.2
6.0
6.5
5.2
5.0
5.5

third or higher
27,338
18.3
18.0
18.5
6.4
6.1
6.8
6.3
6.0
6.7

region of birth

atlantic
7,928
6.3
6.3
6.4
8.0
7.4
8.7
6.4
5.9
7.1

quebec
27,724
22.1
22.0
22.2
8.2
7.9
8.5
6.2
5.9
6.5

ontario
45,823
39.2
39.0
39.3
8.5
8.3
8.8
6.2
6.0
6.5

manitoba
7,989
4.2
4.2
4.3
8.7
7.9
9.5
7.3
6.6
8.0

saskatchewan
6,059
3.5
3.5
3.6
8.0
7.2
8.9
6.2
5.5
7.0

alberta
16,379
12.3
12.2
12.4
8.6
8.1
9.1
7.4
7.0
7.9

british columbia
14,204
12.0
11.9
12.1
7.2
6.8
7.7
5.9
5.4
6.3

territories
1,588
0.4
0.4
0.4
5.6
4.2
7.5
7.0
5.9
8.3

maternal ethnicity

caucasian
87,308
73.8
73.5
74.1
7.2
7.1
7.4
6.1
5.9
6.2

indigenous
17,285
5.9
5.6
6.2
6.4
5.8
6.9
8.2
7.6
8.8

black
3,824
3.4
3.3
3.5
11.5
10.5
12.6
9.2
8.2
10.3

east asian
4,945
4.3
4.2
4.4
9.8
9.0
10.7
5.5
4.9
6.1

southeast asian
3,211
2.9
2.7
3.0
14.4
13.1
15.8
9.3
8.3
10.4

south asian
6,896
6.1
6.0
6.3
15.9
15.1
16.9
7.0
6.4
7.7

other
4,225
3.7
3.5
3.8
9.2
8.4
10.1
5.7
4.9
6.5

maternal marital status

single
16,933
11.6
11.4
11.8
10.8
10.3
11.4
8.0
7.5
8.5

common-law
31,077
23.3
23.0
23.5
8.4
8.0
8.7
6.7
6.4
7.0

married
79,684
65.1
64.9
65.4
7.7
7.6
7.9
6.0
5.8
6.2

maternal education

less than secondary graduation
22,514
13.4
13.1
13.6
10.5
10.0
11.0
7.7
7.3
8.1

secondary graduation
27,197
22.0
21.8
22.3
8.6
8.3
9.0
6.6
6.3
7.0

postsecondary diploma or certificate
42,778
35.2
34.8
35.5
7.8
7.6
8.1
6.5
6.2
6.7

university degree
35,205
29.5
29.2
29.7
7.4
7.1
7.7
5.6
5.3
5.9

maternal economic family income adequacy quintile

1
28,111
20.1
19.8
20.3
9.9
9.5
10.3
7.1
6.7
7.4

2
25,482
19.9
19.7
20.2
8.8
8.5
9.2
6.3
6.0
6.7

3
24,807
19.9
19.7
20.2
7.9
7.6
8.3
6.2
5.9
6.6

4
24,617
20.1
19.8
20.3
7.6
7.2
7.9
6.1
5.7
6.4

5
24,677
20.0
19.8
20.2
7.0
6.6
7.3
6.3
6.0
6.6

Statement: the overall crude rate of preterm birth was 6.4%.
Question: what was the percentage of the overall crude rate of preterm birth?
Answer: [6.4]