Total (n, %) |
1155(19.8) |
4664(80.2) |
|
Characteristics of children |
|
|
|
Gender (n, %) |
|
|
0.329 |
male |
612(52.99) |
2394(51.33) |
|
female |
543(47.01) |
2270(48.67) |
|
Birth weight (g, mean ± SD) |
3404.7±474.21 |
3389.4±487.9 |
0.144 |
Breastfeeding |
|
|
0.328 |
<12months |
162(14.03) |
601(12.89) |
|
≥12 months |
993(85.97) |
4063(87.11) |
|
Birth mode (n, %) |
|
|
0.124 |
Vaginal delivery |
654(56.62) |
2521(54.05) |
|
Cesarean delivery |
501(43.38) |
2143(45.95) |
|
Use of masks (n, %) |
|
|
0.379 |
Yes |
741(64.16) |
3059(65.59) |
|
Preterm birth (n, %) |
|
|
0.645 |
Yes |
55(4.76) |
205(4.40) |
|
Characteristics of parents |
|
|
|
Parental atopy (n, %) |
|
|
0.014 |
Yes |
255(22.08) |
878(18.83) |
|
Maternal age at delivery (years, n, %) |
|
|
0.747 |
<35 |
942(81.56) |
3782(81.09) |
|
≥35 |
213(18.44) |
882(18.91) |
|
Maternal work during pregnancy (n, %) |
|
|
<0.001 |
Yes |
759(65.71) |
2801(60.06) |
|
Maternal Primipara (n, %) |
|
|
<0.001 |
Yes |
621(53.77) |
2230(47.81) |
|
Family characteristics |
|
|
|
House decoration (n, %) |
|
|
0.155 |
Yes |
44(3.81) |
226(4.85) |
|
Home dampness (n, %) |
|
|
0.830 |
Yes |
43(3.72) |
165(3.54) |
|
Use of carpet (n, %) |
|
|
0.255 |
Yes |
51(4.42) |
170(3.65) |
|
Pets (n, %) |
|
|
0.250 |
Yes |
33(2.86) |
104(2.23) |
|
Monthly household income (RMB, n, %) |
|
|
0.009 |
<6000 |
121(10.48) |
625(13.40) |
|
≥6000 |
1034(89.52) |
4039(86.60) |
|
Open windows often (n, %) |
|
|
<0.001 |
Yes |
600(51.95) |
2821(60.50) |
|
Use an air purifier (n, %) |
|
|
0.019 |
Yes |
273(23.64) |
953(20.44) |
|