TABLE 1.

IgE levels across demographic variables, asthma status, atopic status, airways inflammation and socioeconomic variables, stratified by study site; Peru, 2009–2010

Characteristic	Total serum IgE kU·L−1
	Lima#			Tumbes¶
	Geometric mean	Mean ± SD	p-value	Geometric mean	Mean ± SD	p-value
Overall Demographics	262	588 ± 883		192	407 ± 679
Sex
Male	326	692 ± 962		204	416 ± 725
Female	210	484 ± 784	<0.001	178	397 ± 623	0.20
Body mass index >25 kg·m−2
No	240	566 +921		189	396 +652
Yes	432	712 ± 630	<0.001	235	549 ± 951	0.28
Asthma and atopy
Asthma status
No	238	546 ± 891		188	397 ± 666
Yes	516	894 ± 760	<0.001	338	743 ± 1006	0.12
Atopy status
No	182	440 ± 745		147	355 ± 773
Yes	351	716 ± 992	<0.001	294	479 ± 463	<0.001
Asthma phenotype
Atopic	761	1080 ± 794		472	662 ± 438
Non-atopic	136	302 ± 290	<0.01	251	816 ± 1358 (Median = 119)	0.38
Exhaled nitric oxide >40 ppm
No	217	478 ± 764		172	367 ± 666
Yes	1142	1404 ± 877	<0.001	611	838 ± 709	<0.001
Socioeconomic indicators
Maternal education ⩾6 years
No	308	589 ± 680		182	380 ± 507
Yes	249	590 ± 943	0.11	194	419 ± 747	0.60
Income <175 USD per month
No	274	616 ± 946		189	429 ± 672
Yes	229	509 ± 668	0.17	193	394 ± 685	0.85
6+ people per house
No	255	595 ± 925		185	400 ± 731
Yes	268	581 ± 841	0.68	212	428 ± 519	0.26
Concrete floor
No	255	537 ± 691		216	485 ± 876
Yes	273	673 ± 1132	0.59	175	347 ± 468	0.05
Pets in household
Dogs
No	279	571 ± 834		201	433 ± 629
Yes	249	601 ± 920	0.32	188	397 ± 698	0.56
Cats
No	267	632 ± 978		192	413 ± 730
Yes	255	535 ± 750	0.69	191	399 ± 607	0.98
Chickens
No	250	552 ± 771		175	345 ± 487
Yes	311	728 ± 1214	0.12	203	446 ± 775	0.16
Ducks
No	257	581 ± 886		191	385 ± 528
Yes	324	665 ± 848	0.23	192	434 ± 828	0.97
Turkeys
No	262	590 ± 886		190	413 ± 714
Yes	177	353 ± 244	0.71	204	374 ± 413	0.61
Doves
No	257	564 ± 808		190	412 ± 701
Yes	287	719 ± 1205	0.50	204	370 ± 444	0.65
Guinea pigs
No	261	582 ± 830		191	411 ± 691
Yes	266	639 ± 1224	0.91	196	352 ± 441	0.90

^#n= 566;

^¶n=577.