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. 2001 Feb;69(2):996–1001. doi: 10.1128/IAI.69.2.996-1001.2001

TABLE 3.

Sib-sib correlation coefficients for the IgG subclass responses to defined and crude P. falciparum antigensa

Antigen and antibody Urban area
Rural area
Urban and rural areas
Rss P Rss P Rss P
RESA
 IgG1 0.23 0.0016 0.35 0.0010 0.25 0.0001
 IgG2 0.23 0.0020 0.23 0.0210 0.21 0.0006
 IgG3 0.12 NS 0.23 0.0234 0.14 0.0165
 IgG4 0.14 0.0032 0.46 <10–4 0.30 <10–4
 IgG 0.22 0.0023 0.17 NS 0.20 0.0012
MSP-1-Nt
 IgG1 0.20 0.0054 0.30 0.0044 0.24 0.0001
 IgG2 0.22 0.0023 0.17 NS 0.21 0.0008
 IgG3 0.29 0.0001 0.31 0.0034 0.31 <10–4
 IgG4 0.14 0.0290 0.39 0.0003 0.26 0.0001
 IgG 0.28 0.0002 0.19 0.0450 0.24 0.0002
MSP-2-Nt
 IgG1 0.26 0.0004 0.23 0.0210 0.25 0.0001
 IgG2 0.14 0.0280 0.19 0.0457 0.21 0.0009
 IgG3 0.19 0.0071 0.28 0.0078 0.24 0.0001
 IgG4 0.32 <10–4 0.24 0.0183 0.29 <10–4
 IgG 0.28 0.0002 0.34 0.0014 0.30 <10–4
MSP-2-Ct1
 IgG1 0.17 0.0120 0.13 NS 0.15 0.0105
 IgG2 0.46 <10–4 0.27 0.0081 0.39 <10–4
 IgG3 0.13 0.0470 0.22 0.0260 0.18 0.0032
 IgG4 0.24 0.0010 0.16 NS 0.21 0.0007
 IgG 0.32 <10–4 0.19 0.0480 0.26 <10–4
MSP-2-Ct2
 IgG1 0.18 0.0097 0.18 NS 0.18 0.0037
 IgG2 0.20 0.0057 0.22 0.0257 0.22 0.0006
 IgG3 0.25 0.0007 0.24 0.0163 0.26 0.0001
 IgG4 0.35 <10–4 0.10 NS 0.26 0.0001
 IgG 0.32 <10–4 0.14 NS 0.25 0.0001
Extract
 IgG1 0.18 0.0110 0.36 0.0008 0.24 0.0002
 IgG2 0.12 NS 0.30 0.0040 0.19 0.0020
 IgG3 0.16 0.0207 0.27 0.0094 0.19 0.0018
 IgG4 0.21 0.0030 0.19 0.0490 0.21 0.0009
 IgG 0.10 NS 0.26 0.0117 0.13 0.0230
a

The intraclass correlation coefficients were calculated as previously described (9), and the ANOVA F statistic was used to calculate the levels of significance.