Table 4.
Multivariate regression analysis of different pre-pregnancy BMI groups.
| Index | ALL | Pre-pregnancy BMI<24kg/m2 | Pre-pregnancy BMI ≥24kg/m2 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| RR | 95% C I | P | RR | 95% C I | P | RR | 95% C I | P | |
| Pre-pregnancy BMI | 1.132 | 1.119~1.145 | <0.001 | 1.209 | 1.146~1.275 | <0.001 | 1.073 | 1.047~1.099 | <0.001 |
| Age(years) | 1.089 | 1.076~1.102 | <0.001 | 1.086 | 1.065~1.108 | <0.001 | 1.058 | 1.043~1.073 | <0.001 |
| GWG(kg) | 4.080 | 2.114~6.045 | <0.001 | 3.689 | 3.346~4.032 | <0.001 | 5.193 | 4.540~5.846 | <0.001 |
| Weight at the time of BIA(kg) | 1.041 | 1.037~1.046 | <0.001 | 1.038 | 1.022~1.053 | <0.001 | 1.024 | 1.019~1.029 | <0.001 |
| TBW(kg) | |||||||||
| Model 1 | 1.089 | 1.072~1.106 | <0.001 | 1.025 | 0.991~1.059 | 0.151 | 1.047 | 1.029~1.066 | <0.001 |
| Model 2 | 1.136 | 1.119~1.154 | <0.001 | 1.079 | 1.032~1.129 | 0.001 | 1.092 | 1.067~1.117 | <0.001 |
| Model 3 | 0.962 | 0.940~0.984 | 0.001 | 0.951 | 0.911~0.993 | 0.021 | 0.981 | 0.955~1.009 | 0.183 |
| Model 4 | 0.996 | 0.966~1.026 | 0.778 | 0.986 | 0.936~1.039 | 0.596 | 1.002 | 0.968~1.037 | 0.910 |
| Protein(kg) | |||||||||
| Model 1 | 1.381 | 1.304~1.463 | <0.001 | 1.119 | 0.989~1.265 | 0.074 | 1.187 | 1.095~1.285 | <0.001 |
| Model 2 | 1.596 | 1.506~1.692 | <0.001 | 1.364 | 1.165~1.597 | <0.001 | 1.367 | 1.255~1.489 | <0.001 |
| Model 3 | 0.886 | 0.813~0.965 | 0.006 | 0.882 | 0.754~1.032 | 0.116 | 0.933 | 0.844~1.032 | 0.180 |
| Model 4 | 1.010 | 0.909~1.122 | 0.849 | 1.027 | 0.853~1.235 | 0.780 | 1.002 | 0.887~1.131 | 0.977 |
| Minerals(kg) | |||||||||
| Model 1 | 1.961 | 1.701~2.261 | <0.001 | 1.126 | 0.818~1.548 | 0.467 | 1.375 | 1.124~1.628 | 0.002 |
| Model 2 | 2.377 | 1.751~3.266 | <0.001 | 1.797 | 1.165~1.597 | 0.010 | 1.763 | 1.291~2.407 | <0.001 |
| Model 3 | 0.642 | 0.520~0.793 | <0.001 | 0.385 | 0.252~0.586 | 0.500 | 0.811 | 0.636~1.035 | 0.092 |
| Model 4 | 0.966 | 0.721~1.293 | 0.816 | 0.496 | 0.287~0.855 | 0.012 | 1.107 | 0.818~1.499 | 0.510 |
| BMC(kg) | |||||||||
| Model 1 | 2.127 | 1.816~2.492 | <0.001 | 1.193 | 0.816~1.745 | 0.362 | 1.413 | 1.120~1.784 | 0.004 |
| Model 2 | 2.506 | 1.766~3.577 | <0.001 | 2.284 | 1.323~3.944 | 0.003 | 1.803 | 1.266~2.567 | 0.001 |
| Model 3 | 0.597 | 0.467~0.764 | <0.001 | 0.337 | 0.205~0.554 | 0.383 | 0.776 | 0.584~1.032 | 0.082 |
| Model 4 | 1.018 | 0.727~1.427 | 0.916 | 0.491 | 0.255~0.945 | 0.033 | 1.146 | 0.815~1.613 | 0.433 |
| BFM(kg) | |||||||||
| Model 1 | 1.059 | 1.052~1.066 | <0.001 | 1.078 | 1.050~1.107 | <0.001 | 1.036 | 1.025~1.047 | <0.001 |
| Model 2 | 1.057 | 1.050~1.063 | <0.001 | 1.076 | 1.048~1.105 | <0.001 | 1.039 | 1.031~1.047 | <0.001 |
| Model 3 | 1.029 | 1.012~1.047 | 0.001 | 1.038 | 1.006~1.072 | 0.019 | 0.985 | 0.965~1.007 | 0.182 |
| Model 4 | 1.002 | 0.980~1.024 | 0.849 | 1.010 | 0.972~1.050 | 0.603 | 0.998 | 0.973~1.024 | 0.890 |
| SLM(kg) | |||||||||
| Model 1 | 1.069 | 1.056~1.082 | <0.001 | 1.020 | 0.994~1.046 | 0.136 | 1.037 | 1.020~1.054 | <0.001 |
| Model 2 | 1.104 | 1.091~1.118 | <0.001 | 1.062 | 1.026~1.100 | 0.001 | 1.070 | 1.052~1.090 | <0.001 |
| Model 3 | 0.971 | 0.953~0.989 | 0.001 | 0.963 | 0.932~0.996 | 0.028 | 0.985 | 0.965~1.007 | 0.182 |
| Model 4 | 0.998 | 0.975~1.021 | 0.842 | 0.992 | 0.952~1.033 | 0.687 | 1.001 | 0.975~1.028 | 0.924 |
| FFM(kg) | |||||||||
| Model 1 | 1.064 | 1.052~1.076 | <0.001 | 1.018 | 0.994~1.043 | 0.146 | 1.034 | 1.018~1.050 | <0.001 |
| Model 2 | 1.099 | 1.086~1.111 | <0.001 | 1.059 | 1.025~1.094 | 0.001 | 1.067 | 1.049~1.085 | <0.001 |
| Model 3 | 0.972 | 0.955~0.988 | 0.001 | 0.963 | 0.933~0.994 | 0.019 | 0.986 | 0.966~1.006 | 0.167 |
| Model 4 | 0.998 | 0.976~1.020 | 0.849 | 0.990 | 0.952~1.029 | 0.603 | 1.002 | 0.977~1.027 | 0.890 |
| SMM(kg) | |||||||||
| Model 1 | 1.113 | 1.092~1.134 | <0.001 | 1.036 | 0.994~1.079 | 0.091 | 1.059 | 1.031~1.087 | <0.001 |
| Model 2 | 1.168 | 1.145~1.190 | <0.001 | 1.104 | 1.047~1.164 | <0.001 | 1.110 | 1.079~1.142 | <0.001 |
| Model 3 | 0.961 | 0.934~0.989 | 0.006 | 0.955 | 0.907~1.006 | 0.083 | 0.979 | 0.947~1.013 | 0.224 |
| Model 4 | 1.004 | 0.969~1.040 | 0.824 | 1.002 | 0.942~1.066 | 0.994 | 1.004 | 0.964~1.046 | 0.840 |
| PBF(%) | |||||||||
| Model 1 | 1.073 | 1.063~1.084 | <0.001 | 1.051 | 1.030~1.072 | <0.001 | 1.038 | 1.020~1.056 | <0.001 |
| Model 2 | 1.069 | 1.059~1.079 | <0.001 | 1.046 | 1.025~1.067 | <0.001 | 1.043 | 1.028~1.059 | <0.001 |
| Model 3 | 1.024 | 1.013~1.036 | <0.001 | 1.021 | 1.003~1.039 | 0.019 | 1.010 | 0.996~1.025 | 0.168 |
| Model 4 | 1.010 | 0.996~1.024 | 0.147 | 1.005 | 0.983~1.027 | 0.667 | 1.000 | 0.983~1.018 | 0.997 |
| WHR | |||||||||
| Model 1 | 994.455 | 362.269~2729.849 | <0.001 | 206.291 | 23.361~1821.689 | <0.001 | 34.023 | 7.890~146.714 | <0.001 |
| Model 2 | 1051.493 | 421.458~2623.361 | <0.001 | 272.083 | 31.447~2354.089 | <0.001 | 67.603 | 18.049~253.205 | <0.001 |
| Model 3 | 4.342 | 1.427~13.218 | 0.010 | 13.374 | 2.031~88.062 | 0.007 | 1.816 | 0.502~6.576 | 0.363 |
| Model 4 | 4.562 | 1.532~13.582 | 0.006 | 7.132 | 1.008~50.447 | 0.049 | 2.713 | 0.765~9.620 | 0.122 |
| VFL | |||||||||
| Model 1 | 1.121 | 1.105~1.138 | <0.001 | 1.110 | 1.067~1.155 | <0.001 | 1.071 | 1.045~1.098 | <0.001 |
| Model 2 | 1.113 | 1.099~1.127 | <0.001 | 1.103 | 1.062~1.146 | <0.001 | 1.077 | 1.055~1.099 | <0.001 |
| Model 3 | 1.038 | 1.016~1.059 | 0.001 | 1.030 | 0.991~1.071 | 0.129 | 1.014 | 0.989~1.041 | 0.280 |
| Model 4 | 1.014 | 0.991~1.037 | 0.238 | 0.997 | 0.955~1.042 | 0.906 | 1.006 | 0.979~1.033 | 0.664 |
| BMR(kcal/day) | |||||||||
| Model 1 | 1.003 | 1.002~1.003 | <0.001 | 1.001 | 1.000~1.002 | 0.142 | 1.002 | 1.001~1.002 | <0.001 |
| Model 2 | 1.004 | 1.004~1.005 | <0.001 | 1.003 | 1.001~1.004 | 0.001 | 1.003 | 1.002~1.004 | <0.001 |
| Model 3 | 0.999 | 0.998~0.999 | 0.001 | 0.998 | 0.997~1.000 | 0.020 | 0.999 | 0.998~1.000 | 0.165 |
| Model 4 | 1.000 | 0.999~1.001 | 0.854 | 1.000 | 0.998~1.001 | 0.622 | 1.000 | 0.999~1.001 | 0.898 |
RR, relative risk; CI, confidence interval.
Model 1, without adjusting for confounding factors; Model 2, adjusted for age(years), height(kg), gravidity, parity; Model 3, adjusted for weight at the time of BIA(kg), gestational week at the time of BIA, GWG; Model 4, adjusted for Model 2 +Model 3.