Table 2

Unadjusted associations between SNPs from surfactant protein A alleles (SP-A1, SP-A2) and otitis media (OM) episodes before 12 months of age for 355 infants at risk for developing asthma. (CT and MA, 1998 – 2000)



OM Episodes



SNP
n (%)
%

All subjects N (%)
355
258 (72.7)
SP-A1a


     aa 19b


          CC
1 (0.3)

          CT
56 (15.8)
89.5
          TT
294 (83.8)
69.0
     aa 50


          CC
75 (21.2)
80.0
          CG
171 (48.3)
69.0
          GG
108 (30.5)
74.1
     aa 62


          GG
5 (1.4)

          AG
88 (25.2)
74.2
          AA
256 (73.4)
71.9
     aa 133


          GG
2 (0.6)

          AG
51 (14.4)
83.0
          AA
302 (85.1)
70.9
     aa 219


          TT
1 (0.3)

          CT
46 (13.0)
68.1
          CC
308 (86.8)
73.4
SP-A2a


     aa 9


          CC
73 (20.6)
74.0
          AC
171 (48.2)
71.9
          AA
111 (31.3)
73.0
     aa 91


          CC
6 (1.7)

          CG
85 (24.2)
73.6
          GG
261 (74.2)
72.4
     aa 140


          TT
25 (7.1)
64.0
          CT
142 (40.2)
71.1
          CC
186 (52.7)
75.3
     aa 223


          AA
18 (5.1)
77.8
          AC
129 (36.3)
72.9
          CC
208 (58.6)
72.1

aEach of the SNPs was in Hardy-Weinberg equilibrium (P > 0.05).

bP = 0.02, χ2-test.

Pettigrew et al. BMC Medical Genetics 2006 7:68   doi:10.1186/1471-2350-7-68