Table 1.
Baseline characteristics of participants,weighted.
| Characteristic | Nonstone formers | Stone formers | P-value |
|---|---|---|---|
| N=27711 | N=2901 | ||
| Age (years) | 46.812 ± 16.806 | 53.299 ± 15.576 | <0.001 |
| PIR | 2.965 ± 1.600 | 2.982 ± 1.572 | 0.56 |
| BMI (kg/m2) | 28.927 ± 6.829 | 30.623 ± 6.992 | <0.001 |
| Serum Cholesterol (mg/dl) | 194.041 ± 41.436 | 192.268 ± 42.519 | 0.026 |
| Serum Calcium (mg/dl) | 9.392 ± 0.358 | 9.370 ± 0.379 | 0.016 |
| Serum Creatinine (mg/dl) | 0.875 ± 0.328 | 0.937 ± 0.570 | <0.001 |
| Urine Albumin Creatinine Ratio (mg/g) | 31.026 ± 265.850 | 42.047 ± 267.225 | <0.001 |
| METS-IR Index | 43.259 ± 12.936 | 47.291 ± 13.591 | <0.001 |
| Gender (%) | <0.001 | ||
| Male | 47.355 | 54.689 | |
| Female | 52.645 | 45.311 | |
| Race (%) | <0.001 | ||
| Mexican American | 14.772 | 11.198 | |
| White | 65.680 | 76.974 | |
| Black | 11.301 | 5.717 | |
| Other Race | 8.247 | 6.112 | |
| Education Level (%) | 0.005 | ||
| Less than high school | 20.372 | 19.862 | |
| High school | 28.532 | 31.305 | |
| More than high school | 51.097 | 48.833 | |
| Marital Status (%) | <0.001 | ||
| Cohabitation | 63.286 | 69.099 | |
| Solitude | 36.714 | 30.901 | |
| Alcohol (%) | 0.486 | ||
| Yes | 60.328 | 59.463 | |
| No | 18.519 | 19.386 | |
| Unclear | 21.152 | 21.151 | |
| High Blood Pressure (%) | <0.001 | ||
| Yes | 30.098 | 46.704 | |
| No | 69.902 | 53.296 | |
| Diabetes (%) | <0.001 | ||
| Yes | 8.752 | 17.998 | |
| No | 91.248 | 82.002 | |
| Smoked | <0.001 | ||
| Yes | 43.575 | 49.511 | |
| No | 56.425 | 50.489 | |
| Physical Activity (%) | <0.001 | ||
| Never | 26.738 | 31.021 | |
| Moderate | 31.829 | 31.227 | |
| Vigorous | 41.433 | 37.753 | |
| Asthma (%) | <0.001 | ||
| No | 85.474 | 82.656 | |
| Yes | 14.526 | 17.344 | |
| Total Kcal (%) | 0.045 | ||
| Tertile 1 | 24.748 | 24.100 | |
| Tertile 2 | 28.386 | 30.899 | |
| Tertile 3 | 30.846 | 30.930 | |
| Unclear | 16.020 | 14.071 | |
| Total Sugar (%) | 0.174 | ||
| Tertile 1 | 23.723 | 24.460 | |
| Tertile 2 | 24.612 | 23.062 | |
| Tertile 3 | 24.438 | 25.611 | |
| Unclear | 27.226 | 26.867 | |
| Total Water (%) | 0.005 | ||
| Tertile 1 | 23.778 | 22.598 | |
| Tertile 2 | 28.903 | 30.070 | |
| Tertile 3 | 31.299 | 33.261 | |
| Unclear | 16.020 | 14.071 | |
| Total Fat (%) | 0.005 | ||
| Tertile 1 | 23.778 | 22.598 | |
| Tertile 2 | 28.903 | 30.070 | |
| Tertile 3 | 31.299 | 33.261 | |
| Unclear | 16.020 | 14.071 |
Statistically significant: p<0.05; Mean+SD for continuous variables: P value was calculated by weighted linear regression model.
%for Categorical variables: P value was calculated by weighted chi-square test.
BMI, Body mass index (kg/m2); PIR, Ratio of family income to poverty.