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. 2018 May 15;9:469. doi: 10.3389/fphys.2018.00469

Table 3.

Summary of the subgroup analyses in this meta-analysis.

Comparisons Category Category Studies OR (95% CI) P-value P for heterogeneity I2(%)
A vs. G Ethnicity Asian 12 1.46(1.16, 1.85) 0.002 0.054 32.8
Caucasian 8 0.72(0.53, 0.99) 0.043 0.106 56.4
SOC HB 13 1.26(0.97, 1.64) 0.084 0.117 55.3
PB 7 0.77(0.49, 1.22) 0.271 0.265 77.2
HWE Positive 14 1.19(0.90, 1.59) 0.226 0.183 65.7
Negative 6 0.76(0.57, 1.00) 0.051 0.019 14.8
Genotyping PCR-RFLR 3 0.80(0.35, 1.80) 0.582 0.299 58.6
Sequencing 5 0.80(0.45, 1.43) 0.455 0.223 53.7
TagMan 5 0.86(0.62, 1.19) 0.355 0.063 47.8
Other methods 7 1.54(1.04, 2.30) 0.033 0.200 71.1
NOS score 5 ≤ Score ≤ 6 14 1.22(0.97, 1.53) 0.054 0.047 42.5
Score > 6 6 0.75(0.41, 1.37) 0.185 <0.001 83.2
GA+AA vs. GG Ethnicity Asian 12 1.46(1.11, 1.91) 0.007 0.086 40.4
Caucasian 8 0.73(0.54, 0.99) 0.043 0.082 47.3
SOC HB 13 1.25(0.95, 1.65) 0.111 0.122 52.6
PB 7 0.79(0.50, 1.24) 0.301 0.253 69.6
HWE Positive 14 1.16(0.85, 1.57) 0.357 0.216 67.0
Negative 6 0.80(0.62, 1.04) 0.095 <0.001 0.0
Genotyping PCR-RFLR 3 0.81(0.36, 1.83) 0.606 0.291 56.8
Sequencing 5 0.80(0.42, 1.50) 0.479 0.262 51.8
TagMan 5 0.87(0.66, 1.15) 0.333 0.025 24.1
Other methods 7 1.53(0.99, 2.36) 0.054 0.243 72.6
NOS score 5 ≤ Score ≤ 6 14 1.20(0.95, 1.50) 0.120 0.105 33.8
Score >6 6 0.77(0.41, 1.45) 0.414 <0.001 82.8
AA vs. GA+GG Ethnicity Asian 7 2.41(1.16, 4.98) 0.018 0.300 17.1
Caucasian 6 0.51(0.23, 1.12) 0.095 0.040 57.2
SOC HB 8 1.50(0.84, 2.67) 0.172 0.021 57.5
PB 5 0.53(0.19, 1.48) 0.226 0.673 0.0
HWE Positive 7 3.82(1.69, 8.61) 0.001 0.172 33.6
Negative 6 0.45(0.21, 0.93) 0.031 0.457 0.0
Genotyping PCR-RFLR 1 0.58(0.02, 14.52) 0.741 N/A N/A
Sequencing 4 0.86(0.33, 2.25) 0.761 0.835 0.0
TagMan 4 0.61(0.26, 1.42) 0.247 0.012 72.5
Other methods 4 3.43(1.37, 8.61) 0.009 0.127 47.4
NOS score 5 ≤ Score ≤ 6 8 1.50(0.84, 2.67) 0.172 0.021 57.5
Score>6 5 0.53(0.19, 1.48) 0.226 0.673 0.0
AA vs. GG Ethnicity Asian 7 2.41(1.17, 4.98) 0.018 0.291 18.3
Caucasian 6 0.50(0.23, 1.10) 0.084 0.039 57.4
SOC HB 8 1.50(0.84, 2.67) 0.171 0.021 57.6
PB 5 0.51(0.18, 1.43) 0.199 0.641 0.0
HWE Positive 7 3.68(1.64, 8.28) 0.002 0.146 37.0
Negative 6 0.44(0.21, 0.92) 0.029 0.446 0.0
Genotyping PCR-RFLR 1 0.53(0.02, 13.30) 0.700 N/A N/A
Sequencing 4 0.85(0.33, 2.21) 0.740 0.794 0.0
TagMan 4 0.60(0.26, 1.40) 0.236 0.013 72.4
Other methods 4 3.40(1.36, 8.47) 0.009 0.121 48.4
NOS score 5 ≤ Score ≤ 6 8 1.50(0.84, 2.67) 0.171 0.021 57.6
Score>6 5 0.51(0.18, 1.43) 0.199 0.641 0.0
GA vs. GG Ethnicity Asian 12 1.40(1.03, 1.91) 0.032 0.032 48.0
Caucasian 8 0.76(0.57, 1.01) 0.057 0.115 39.6
SOC HB 13 1.21(0.90, 1.63) 0.210 0.011 53.7
PB 7 0.82(0.53, 1.26) 0.358 0.009 64.9
HWE Positive 14 1.09(0.80, 1.50) 0.585 <0.001 67.6
Negative 6 0.87(0.66, 1.15) 0.322 0.466 0.0
Genotyping PCR-RFLR 3 0.84(0.38, 1.82) 0.651 0.651 52.6
Sequencing 5 0.80(0.39, 1.66) 0.553 0.553 49.0
TagMan 5 0.90(0.69, 1.16) 0.411 0.411 7.6
Other methods 7 1.43(0.91, 2.26) 0.120 0.120 73.9
NOS score 5 ≤ Score ≤ 6 14 1.16(0.91, 1.47) 0.233 0.096 34.9
Score>6 6 0.80(0.43, 1.48) 0.473 <0.001 80.8

SOC, source of controls; PB, population-based controls; HB, hospital-based controls; NOS, Newcastle-Ottawa Scale; HWE, Hardy–Weinberg equilibrium; PCR-RFLR, PCR-restriction fragment length polymorphism. Bold values are statistically significant (P < 0.05).