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Table 2 Multiple logistic regression of risk factors for three allergic diseases

From: Prevalence and risk factors of childhood allergic diseases in eight metropolitan cities in China: A multicenter study

Variables   Asthma
OR(95% CI )
Allergic rhinitis
OR(95% CI )
Eczema
OR(95% CI )
Gender Male 15(13-18 ) 14 (12-15 )  
Age3    11(10-12 )  
Diagnosed GER Yes 23(12-43)   
Diagnosed obesity Yes 17(11-27 )   15 (10-23)
Mode of delivery Caesarean (Ref.)    
  Vaginal 08(07-09 )   
Carbonated drinks intake > = 5 times/week 18(13-26)   
Exclusive breast feeding > = 4 months   08(07-09)  
Computer use as amusements > = 5 times/week    13(11-16)
Diagnosed childhood ADHD Yes 14(10-20) 17(14-21) 15(12-20)
Diagnosed prepartum and postpartum depression Yes    17(13-24)
Family structure Single-parent and extended family (Ref.)    
  Nuclear family 08(07-10)   
Household income per capita > = 1500RMB/month 13(11-17) 12(11-14)  
Maternal education level > = High school graduate 15(12-18) 12(11-14) 13(12-16)
Paternal education level > = High school graduate   13(11-14)  
Maternal education level *Household income per capita > = High school graduate and > = 1500RMB/month 1.6(1.1,2.4)   
Common cold >5 times/year 32(27-38) 23(21-26) 18(15-21)
Snoring Yes   15(13-17)  
Sleep-disordered breathing Yes 23(16-31) 23(19-29) 15(11-20)
Paternal snoring Yes 12(10-15) 12(11-13) 12(10-14)
Parental age at child's birth   12(11-13) 11(10-13)  
Diagnosed recurrent otitis media Yes   21(18-26) 19(15-24)
Diagnosed asthma Yes   43(36-52) 27(22-34)
Diagnosed allergic rhinitis Yes 32(27-36)   18(15-21)
Diagnosed eczema Yes 29(23-37) 18(15-22)  
Common cold*Snoring Yes   1.3(1.0,1.8)  
Site    Urumqi (Ref.)    
     Shanghai 44(29-66) 1∙0(0∙9-1∙3) 0∙9(0∙7-1∙2)
     Guangzhou 1∙4(0∙9-2∙2) 16(13-19) 0∙8(0∙6-1∙1)
     Xi'an 14(37-26) 04(03-06) 0∙9(0∙6-1∙2)
     Wuhan 27(17-44) 0∙9(0∙7-1∙1) 1∙1(0∙8-1∙5)
     Chengdu 32(20-49) 0∙8(0∙7-1∙0) 0∙6(0∙5-0∙8)
     Harbin 1∙4(0∙8-2∙3) 05(04-06) 1∙0(0∙7-1∙3)
     Hohhot 0∙9(0∙5-1∙7) 06(04-07) 13(10-17)
  1. Values highlighted in bold indicate OR within 95% CI and statistically significant at P < 0∙05.