|
n |
% |
n |
% |
|
Maternal age at pregnancy (years) |
|
|
|
|
<0.001 |
<20 |
405 |
0.7 |
50 |
0.4 |
|
20-29 |
24,436 |
40.1 |
3,908 |
28.4 |
|
30-39 |
34,254 |
56.3 |
8,889 |
64.6 |
|
>=40 |
1,788 |
2.9 |
909 |
6.6 |
|
Parity |
|
|
|
|
0.002 |
0 |
18,167 |
29.8 |
3,920 |
28.5 |
|
1 |
21,140 |
34.7 |
4,774 |
34.7 |
|
>=2 |
21,576 |
35.4 |
5,062 |
36.8 |
|
Sex (male) |
31,124 |
51.1 |
7,051 |
51.3 |
0.772 |
Gestational age (weeks) |
|
|
|
|
<0.001 |
<37 |
1,834 |
3.0 |
1,374 |
10.0 |
|
37 |
3,738 |
6.1 |
3,281 |
23.9 |
|
38 |
11,012 |
18.1 |
5,742 |
41.7 |
|
39-41 |
44,299 |
72.8 |
3,359 |
24.4 |
|
SGA |
1,882 |
3.1 |
672 |
4.9 |
<0.001 |
Maternal allergies |
31,399 |
51.6 |
7,115 |
51.7 |
0.75 |
Maternal smoking during pregnancy |
2,227 |
3.7 |
566 |
4.1 |
0.011 |
passive smoking during pregnancy |
21,644 |
35.6 |
5,003 |
36.4 |
0.07 |
Maternal education periods (year) |
|
|
|
|
0.008 |
<10 |
2,278 |
3.7 |
512 |
3.7 |
|
10-12 |
18,943 |
31.1 |
4,449 |
32.3 |
|
13-16 |
38,717 |
63.6 |
8,554 |
62.2 |
|
>=17 |
945 |
1.6 |
241 |
1.8 |
|
Annual family income (JPY) |
|
|
|
|
0.003 |
<2,000,000 |
3,059 |
5.0 |
742 |
5.4 |
|
2,000,000-5,999,999 |
41,277 |
67.8 |
9,113 |
66.2 |
|
6,000,000-9,999,999 |
13,954 |
22.9 |
3,258 |
23.7 |
|
>=10,000,000 |
2,593 |
4.3 |
643 |
4.7 |
|
Marriage |
58,786 |
96.6 |
13,307 |
96.7 |
0.293 |
Breastfeeding at 6 mo |
46,313 |
76.1 |
9,773 |
71.0 |
<0.001 |
Pet owner |
14,341 |
23.6 |
3,380 |
24.6 |
0.011 |
Passive smoking exposure of infants at 1 mo |
30,730 |
50.5 |
6,897 |
50.1 |
0.477 |
Allergy disease |
|
|
|
|
|
Asthma |
1,514 |
2.5 |
371 |
2.7 |
0.156 |
Atopic dermatitis |
2,666 |
4.4 |
581 |
4.2 |
0.42 |
Wheezing |
11,871 |
19.5 |
2,777 |
20.2 |
0.066 |
Eczema |
11,562 |
19.0 |
2,486 |
18.1 |
0.013 |
SGA: small gestational age; JPY: Japanese yen. |
SGA: small gestational
age; JPY: Japanese yen. |
SGA: small gestational age; JPY: Japanese yen. |
SGA: small gestational age; JPY: Japanese yen. |
SGA: small
gestational age; JPY: Japanese yen. |
SGA: small gestational age; JPY:
Japanese yen. |
The p value was determined using the chi-square test. |
The
p value was determined using the chi-square test. |
The p
value was determined using the chi-square test. |
The p value was
determined using the chi-square test. |
The p value was
determined using the chi-square test. |
The p value was
determined using the chi-square test. |