Table 1.
Baseline characteristics of participants, weighted.
| Characteristic | Nonstone formers (n = 4259) | Stone formers (n = 534) | P-value |
|---|---|---|---|
| Age (years) | 47.25 (46.05,48.46) | 56.47 (55.38,57.55) | <0.0001 |
| Serum Cholesterol (mg/dl) | 189.88 (186.41,193.36) | 187.70 (182.31,193.10) | 0.3459 |
| METS-IR Index | 43.81 (42.89,44.74) | 50.10 (48.08,52.12) | <0.0001 |
| Gender | <0.0001 | ||
| Male | 50.95 (48.81,53.08) | 26.02 (21.40,31.25) | |
| Female | 49.05 (46.92,51.19) | 73.98 (68.75,78.60) | |
| Race | 0.0526 | ||
| Mexican American | 16.13 (12.16,21.07) | 13.11 (9.56,17.71) | |
| White | 62.23 (56.41,67.71) | 70.05 (61.46,77.43) | |
| Black | 11.20 (8.01,15.44) | 7.04 (4.98,9.87) | |
| Other Race | 10.45 (7.98,13.57) | 9.80 (5.74,16.23) | |
| Education Level | 0.8148 | ||
| Less than high school | 11.28 (9.60,13.21) | 10.13 (7.32,13.84) | |
| High school | 27.03 (23.55,30.81) | 28.36 (22.25,35.38) | |
| More than high school | 61.69 (57.06,66.12) | 61.51 (55.77,66.95) | |
| Marital Status | 0.3617 | ||
| Cohabitation | 63.31 (60.52,66.02) | 60.75 (54.14,66.98) | |
| Solitude | 36.69 (33.98,39.48) | 39.25 (33.02,45.86) | |
| Alcohol | 0.014 | ||
| Yes | 6.94 (5.38,8.91) | 3.97 (1.93,7.97) | |
| No | 8.08 (7.18,9.08) | 3.76 (1.84,7.52) | |
| Unclear | 84.98 (83.09,86.69) | 92.27 (86.73,95.62) | |
| High Blood Pressure | <0.0001 | ||
| Yes | 30.29 (27.63,33.08) | 49.67 (43.52,55.82) | |
| No | 69.71 (66.92,72.37) | 50.33 (44.18,56.48) | |
| Diabetes | <0.0001 | ||
| Yes | 10.07 (8.92,11.34) | 22.81 (18.16,28.25) | |
| No | 89.93 (88.66,91.08) | 77.19 (71.75,81.84) | |
| Smoked | 0.0603 | ||
| Yes | 41.75 (38.99,44.56) | 48.22 (39.75,56.80) | |
| No | 58.25 (55.44,61.01) | 51.78 (43.20,60.25) | |
| Physical Activity | 0.0002 | ||
| Never | 23.54 (21.46,25.75) | 29.00 (23.78,34.85) | |
| Moderate | 28.39 (25.38,31.61) | 35.61 (28.51,43.40) | |
| Vigorous | 48.07 (45.99,50.17) | 35.39 (29.54,41.71) | |
| PIR | 0.0166 | ||
| <1.3 | 17.78 (16.24,19.43) | 16.80 (12.43,22.32) | |
| ≥1.3,<3.5 | 30.97 (27.28,34.92) | 40.13 (32.33,48.45) | |
| ≥3.5 | 40.97 (36.62,45.47) | 32.07 (27.01,37.60) | |
| Unclear | 10.28 (8.37,12.56) | 11.00 (8.14,14.69) | |
| Total Kcal | 0.0091 | ||
| Lower | 37.71 (35.66,39.80) | 47.10 (40.42,53.89) | |
| Higher | 45.08 (42.80,47.38) | 39.92 (33.35,46.88) | |
| Unclear | 17.21 (14.86,19.85) | 12.98 (9.89,16.84) | |
| Total Sugar | 0.8265 | ||
| Lower | 34.10 (31.72,36.56) | 35.98 (30.18,42.22) | |
| Higher | 35.00 (32.21,37.89) | 34.23 (27.46,41.70) | |
| Unclear | 30.91 (27.73,34.28) | 29.80 (24.89,35.22) | |
| Total Water | 0.012 | ||
| Lower | 37.13 (35.24,39.05) | 45.64 (39.02,52.42) | |
| Higher | 45.66 (43.32,48.02) | 41.38 (35.12,47.94) | |
| Unclear | 17.21 (14.86,19.85) | 12.98 (9.89,16.84) | |
| Total Fat | 0.012 | ||
| Lower | 37.13 (35.24,39.05) | 45.64 (39.02,52.42) | |
| Higher | 45.66 (43.32,48.02) | 41.38 (35.12,47.94) | |
| Unclear | 17.21 (14.86,19.85) | 12.98 (9.89,16.84) |
For continuous variables: survey-weighted mean (95% CI), P-value was by survey-weighted linear regression.
For categorical variables: survey-weighted percentage (95% CI), P-value was by survey-weighted Chi-square test.