Table 1 Demographic information for 12,771 participants
Characteristics | Northern China | 听 | Southern China | ||||
|---|---|---|---|---|---|---|---|
Asthma(n鈥�=鈥�393) | No asthma(n鈥�=鈥�7254) | P-value | 听 | Asthma(n鈥�=鈥�175) | No asthma(n鈥�=鈥�4949) | P-value | |
Gender | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥傿辞测 | 235(59.8%) | 3732(51.4%) | &濒迟;鈥�0.001 | 听 | 107(61.1%) | 2556(51.6%) | 0.013 |
鈥僄颈谤濒蝉 | 158(40.2%) | 3522(48.6%) | 听 | 68(38.9%) | 2393(48.4%) | ||
Age | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥�4 years old | 21(5.4%) | 183(2.5%) | &濒迟;鈥�0.001 | 听 | 1(0.6%) | 16(0.3%) | 0.004 |
鈥�5 years old | 33(8.4%) | 241(3.3%) | 听 | 3(1.7%) | 20(0.4%) | ||
鈥�6 years old | 32(8.1%) | 277(3.8%) | 听 | 4(2.3%) | 30(0.6%) | ||
鈥�7 years old | 52(13.2%) | 715(9.9%) | 听 | 18(10.3%) | 420(8.5%) | ||
鈥�8 years old | 43(10.9%) | 544(7.5%) | 听 | 29(16.6%) | 591(11.9%) | ||
鈥�9 years old | 53(13.5%) | 1034(14.3%) | 听 | 23(13.1%) | 576(11.7%) | ||
鈥�10 years old | 42(10.7%) | 874(12.0%) | 听 | 16(9.1%) | 575(11.7%) | ||
鈥�11 years old | 38(9.7%) | 918(12.7%) | 听 | 23(13.1%) | 495(10.0%) | ||
鈥�12 years old | 28(7.1%) | 776(10.7%) | 听 | 14(8%) | 541(10.9%) | ||
鈥�13 years old | 29(7.4%) | 848(11.7%) | 听 | 23(13.1%) | 873(17.6%) | ||
鈥�14 years old | 22(5.6%) | 844(11.6%) | 听 | 21(12%) | 812(16.4%) | ||
鈥僊别补苍鈥壜扁赌塖顿 | 8.87鈥壜扁赌�2.79 | 10.10鈥壜扁赌�2.67 | &濒迟;鈥�0.001 | 听 | 10.18鈥壜扁赌�2.51 | 10.83鈥壜扁赌�2.39 | &濒迟;鈥�0.001 |
Ethnicity | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥僅an Chinese | 270(68.7%) | 5878(81.0%) | &濒迟;鈥�0.001 | 听 | 174(99.4%) | 4920(99.4%) | 0.980 |
鈥僌迟丑别谤蝉 | 123(31.3%) | 1376(19.0%) | 听 | 1(0.6%) | 29(0.6%) | ||
BMI | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥僓苍诲别谤飞别颈驳丑迟 | 5(1.3%) | 49(0.7%) | 0.418 | 听 | 4(2.3%) | 33(0.6%) | 0.017 |
鈥僋辞rmal weight | 308(78.4%) | 5589(77.0%) | 听 | 126(72%) | 3888(78.6%) | ||
鈥僌惫别谤飞别颈驳丑迟 | 62(15.8%) | 1291(17.8%) | 听 | 34(19.4%) | 835(16.9%) | ||
鈥僌产别蝉别 | 18(4.5%) | 325(4.5%) | 听 | 11(6.3%) | 193(3.9%) | ||
Parity | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥僃颈谤蝉迟 | 254(64.6%) | 4466(61.6%) | 0.223 | 听 | 83(47.4%) | 2315(46.8%) | 0.865 |
鈥僌迟丑别谤蝉 | 139(35.4%) | 2788(38.4%) | 听 | 听 | 92(52.6%) | 2634(53.2%) | |
Birth method | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥僔aginal delivery | 166(42.4%) | 3395(46.8%) | 0.077 | 听 | 106(60.6%) | 2259(45.6%) | 0.105 |
鈥僀esarean delivery | 227(57.8%) | 3859(53.2%) | 听 | 69(39.4%) | 2690(54.4%) | ||
Gestational age at birth | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥僃ull-term birth | 363(92.4%) | 6977(96.2%) | &濒迟;鈥�0.001 | 听 | 166(94.9%) | 4764(96.3%) | 0.339 |
鈥僌迟丑别谤蝉 | 30(7.6%) | 277(3.8%) | 听 | 9(5.1%) | 185(3.7%) | ||
Single birth | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥僘别蝉 | 385(97.8%) | 7046(97.1%) | 0.332 | 听 | 168(96.0%) | 4706(95.1%) | 0.583 |
鈥僋辞 | 8(2.2%) | 208(2.9%) | 听 | 7(4.0%) | 243(4.9%) | ||
Birth weight (g) | 听 | 听 | 听 | 听 | 听 | 听 | 听 |
鈥�&濒迟;2500 | 50(12.7%) | 814(11.2%) | 0.277 | 听 | 19(10.9%) | 639(12.9%) | 0.245 |
鈥�2500鈥�4000 | 337(85.8%) | 6151(84.8%) | 听 | 150(85.7%) | 4016(81.2%) | ||
鈥�&驳迟;4000 | 6(1.5%) | 289(4.0%) | 听 | 6(3.4%) | 294(5.9%) | ||