Table 4.
Stratifiedlogistic regression analysis to identify variables that modify the correlation between HEI-2015 and kidney stonesa.
| Model 1a | P for interaction | Model 2b | P for interaction | Model 3c | P for interaction | |
|---|---|---|---|---|---|---|
| Gender | 0.064 | 0.542 | 0.837 | |||
| Male | 0.996 (0.992, 0.999) | 0.989 (0.985, 0.993) | 0.990 (0.986, 0.994) | |||
| Female | 0.990 (0.986, 0.994) | 0.987 (0.983, 0.991) | 0.991 (0.986, 0.995) | |||
| Age (years) | 0.390 | 0.440 | 0.883 | |||
| 20–34 | 0.987 (0.979, 0.996) | 0.987 (0.978, 0.995) | 0.990 (0.981, 0.999) | |||
| 35–49 | 0.985 (0.979, 0.991) | 0.986 (0.980, 0.992) | 0.991 (0.984, 0.997) | |||
| 50–64 | 0.986 (0.981, 0.991) | 0.986 (0.981, 0.991) | 0.989 (0.984, 0.994) | |||
| ≥65 | 0.991 (0.986, 0.996) | 0.991 (0.986, 0.996) | 0.992 (0.987, 0.997) | |||
| Race | 0.497 | 0.530 | 0.921 | |||
| Mexican American | 0.999 (0.991, 1.007) | 0.994 (0.986, 1.002) | 0.994 (0.986, 1.002) | |||
| Other Hispanic | 0.994 (0.986, 1.002) | 0.990 (0.982, 0.998) | 0.991 (0.983, 1.000) | |||
| Non-Hispanic white | 0.991 (0.987, 0.995) | 0.987 (0.983, 0.990) | 0.990 (0.986, 0.994) | |||
| Non-Hispanic black | 0.994 (0.986, 1.002) | 0.990 (0.982, 0.998) | 0.990 (0.982, 0.998) | |||
| Other races | 0.991 (0.982, 1.000) | 0.986 (0.976, 0.995) | 0.993 (0.982, 1.003) | |||
| Education | 0.024 | 0.005 | 0.041 | |||
| Less than 9th grade | 0.999 (0.991, 1.008) | 0.999 (0.990, 1.008) | 0.999 (0.989, 1.009) | |||
| 9–11th grade | 0.996 (0.989, 1.004) | 0.994 (0.986, 1.002) | 0.996 (0.988, 1.004) | |||
| High school graduate | 0.997 (0.991, 1.004) | 0.993 (0.986, 0.999) | 0.994 (0.988, 1.001) | |||
| Some college | 0.992 (0.987, 0.997) | 0.986 (0.981, 0.991) | 0.988 (0.982, 0.993) | |||
| College graduate or above | 0.985 (0.980, 0.991) | 0.981 (0.975, 0.987) | 0.985 (0.979, 0.991) | |||
| Marital Status | 0.120 | 0.092 | 0.090 | |||
| Married | 0.988 (0.984, 0.991) | 0.986 (0.982, 0.990) | 0.988 (0.984, 0.992) | |||
| Widowed | 0.999 (0.990, 1.008) | 1.000 (0.991, 1.009) | 1.002 (0.992, 1.011) | |||
| Divorced | 0.986 (0.978, 0.994) | 0.985 (0.977, 0.993) | 0.986 (0.977, 0.994) | |||
| Separated | 0.994 (0.979, 1.009) | 0.993 (0.978, 1.009) | 0.994 (0.978, 1.010) | |||
| Never married | 0.994 (0.985, 1.003) | 0.990 (0.981, 0.999) | 0.996 (0.986, 1.006) | |||
| Living with partner | 0.997 (0.986, 1.009) | 0.990 (0.978, 1.002) | 0.996 (0.984, 1.008) | |||
| Poverty Income Ratio | 0.403 | 0.426 | 0.825 | |||
| ≤ 1.3 | 0.994 (0.989, 1.000) | 0.992 (0.987, 0.997) | 0.992 (0.987, 0.998) | |||
| >1.3 and ≤ 3.5 | 0.992 (0.988, 0.997) | 0.988 (0.983, 0.993) | 0.990 (0.985, 0.995) | |||
| >3.5 | 0.989 (0.984, 0.994) | 0.986 (0.980, 0.991) | 0.989 (0.983, 0.995) | |||
| Missing | 0.996 (0.987, 1.006) | 0.989 (0.980, 0.999) | 0.992 (0.982, 1.002) | |||
| BMI (kg/m2) | 0.980 | 0.912 | 0.938 | |||
| <25 | 0.993 (0.987, 0.999) | 0.988 (0.982, 0.994) | 0.990 (0.983, 0.997) | |||
| 25–30 | 0.988 (0.960, 1.018) | 0.984 (0.955, 1.015) | 0.980 (0.947, 1.014) | |||
| ≥30 | 0.994 (0.989, 0.999) | 0.990 (0.985, 0.995) | 0.991 (0.986, 0.996) | |||
| Missing | 0.994 (0.990, 0.998) | 0.990 (0.985, 0.994) | 0.991 (0.986, 0.995) | |||
| Smoking | 0.787 | 0.665 | 0.382 | |||
| Non-smoker | 0.994 (0.990, 0.998) | 0.989 (0.985, 0.993) | 0.992 (0.988, 0.996) | |||
| Smoker | 0.993 (0.989, 0.997) | 0.988 (0.984, 0.992) | 0.989 (0.985, 0.993) | |||
| Alcohol | 0.612 | 0.354 | 0.432 | |||
| Non-drinker | 0.995 (0.989, 1.000) | 0.992 (0.986, 0.998) | 0.994 (0.988, 1.000) | |||
| Drinker | 0.992 (0.988, 0.996) | 0.987 (0.983, 0.991) | 0.989 (0.985, 0.993) | |||
| Missing | 0.991 (0.984, 0.997) | 0.988 (0.981, 0.994) | 0.990 (0.984, 0.997) | |||
| Moderate activity | 0.893 | 0.709 | 0.789 | |||
| No | 0.993 (0.990, 0.997) | 0.989 (0.986, 0.993) | 0.990 (0.986, 0.994) | |||
| Yes | 0.994 (0.989, 0.998) | 0.988 (0.984, 0.993) | 0.991 (0.986, 0.996) | |||
| Vigorous activity | 0.700 | 0.039 | 0.039 | |||
| No | 0.994 (0.991, 0.997) | 0.990 (0.987, 0.993) | 0.992 (0.989, 0.995) | |||
| Yes | 0.992 (0.985, 0.999) | 0.982 (0.975, 0.989) | 0.984 (0.976, 0.991) | |||
| Gout | 0.647 | 0.262 | 0.556 | |||
| No | 0.992 (0.989, 0.995) | 0.988 (0.985, 0.991) | 0.990 (0.987, 0.993) | |||
| Yes | 0.995 (0.985, 1.005) | 0.994 (0.984, 1.004) | 0.994 (0.983, 1.004) | |||
| Congestive heart failure | 0.770 | 0.396 | 0.437 | |||
| No | 0.992 (0.989, 0.995) | 0.988 (0.985, 0.991) | 0.990 (0.987, 0.993) | |||
| Yes | 0.994 (0.982, 1.006) | 0.993 (0.981, 1.006) | 0.995 (0.983, 1.008) | |||
| Cancer | 0.638 | 0.270 | 0.433 | |||
| No | 0.991 (0.988, 0.995) | 0.987 (0.984, 0.991) | 0.990 (0.987, 0.993) | |||
| Yes | 0.993 (0.986, 1.000) | 0.992 (0.985, 0.999) | 0.993 (0.986, 1.001) | |||
| High blood pressure | 0.654 | 0.404 | 0.527 | |||
| No | 0.992 (0.988, 0.996) | 0.988 (0.984, 0.992) | 0.990 (0.986, 0.994) | |||
| Yes | 0.991 (0.987, 0.995) | 0.990 (0.986, 0.994) | 0.992 (0.987, 0.996) | |||
| Diabetes | 0.516 | 0.183 | 0.120 | |||
| No | 0.992 (0.989, 0.995) | 0.988 (0.984, 0.991) | 0.989 (0.986, 0.993) | |||
| Yes | 0.992 (0.986, 0.998) | 0.993 (0.987, 0.999) | 0.996 (0.989, 1.002) | |||
| Missing | 0.983 (0.967, 0.999) | 0.981 (0.964, 0.997) | 0.981 (0.964, 0.998) |
a
Adjusted for: None.
b
Adjusted for: gender, age, race.
c
Adjusted for: gender, age, race, poverty income ratio, BMI, education, marital status, smoking, alcohol, energy, vigorous activity, moderate activity, gout, diabetes, high blood pressure, congestive heart failure, cancer. All the models are not adjusted for the variable itself in each stratification.