Table 1.
Baseline characteristics of participants by the METS-IR index quartiles, weighted
| Total | Q1 (17.14–34.39) | Q2 (34.39–41.56) | Q3 (41.56–50.19) | Q4 (50.19–193.33) | P-value | |
|---|---|---|---|---|---|---|
| Participants (n) | 17,474 | 4369 | 4368 | 4368 | 4369 | |
| Age (year), mean (SE) | 47.85 (0.25) | 44.88 (0.44) | 48.95 (0.39) | 49.36 (0.36) | 48.53 (0.33) | < 0.001 |
| Age (%) | < 0.001 | |||||
| < 50 | 54.30 | 60.91 | 51.77 | 50.82 | 53.00 | |
| ≥ 50 | 45.70 | 39.09 | 48.23 | 49.18 | 47.00 | |
| Gender (%) | < 0.001 | |||||
| Male | 49.76 | 37.29 | 53.59 | 56.97 | 52.57 | |
| Female | 50.24 | 62.71 | 46.41 | 43.03 | 47.43 | |
| Race/ethnicity (%) | < 0.001 | |||||
| Mexican American | 8.23 | 5.23 | 7.98 | 10.18 | 9.87 | |
| Other Hispanic | 5.40 | 4.50 | 5.58 | 6.37 | 5.27 | |
| Non-Hispanic White | 69.43 | 71.90 | 69.53 | 67.70 | 68.33 | |
| Non-Hispanic Black | 10.24 | 9.15 | 9.86 | 10.23 | 11.83 | |
| Other race | 6.69 | 9.22 | 7.06 | 5.52 | 4.70 | |
| Education level (%) | < 0.001 | |||||
| Less than high school | 16.44 | 12.96 | 16.90 | 17.83 | 18.45 | |
| High school or GED | 23.93 | 20.78 | 23.22 | 26.40 | 25.70 | |
| Above high school | 59.63 | 66.26 | 59.89 | 55.77 | 55.85 | |
| Marital status (%) | < 0.001 | |||||
| Living alone | 35.64 | 39.44 | 36.66 | 32.02 | 33.97 | |
| Married or living with partner | 64.36 | 60.56 | 63.34 | 67.98 | 66.03 | |
| Family PIR (%) | < 0.001 | |||||
| ≤ 1.3 | 19.17 | 17.83 | 17.36 | 19.39 | 22.25 | |
| > 1.3 and ≤ 3.5 | 34.23 | 31.26 | 34.84 | 35.36 | 35.78 | |
| > 3.5 | 40.21 | 43.85 | 41.78 | 38.84 | 35.97 | |
| Unclear | 6.39 | 7.05 | 6.01 | 6.41 | 6.00 | |
| Smoking status (%) | < 0.001 | |||||
| Current smokers | 20.86 | 23.11 | 21.51 | 19.41 | 19.16 | |
| Former smokers | 25.92 | 21.62 | 24.94 | 28.49 | 29.13 | |
| Nonsmokers | 53.22 | 55.27 | 53.55 | 52.10 | 51.71 | |
| Alcohol intaking (%) | < 0.001 | |||||
| Nondrinkers | 27.12 | 24.83 | 24.87 | 28.30 | 30.77 | |
| Drinkers | 71.48 | 73.86 | 73.76 | 70.36 | 67.65 | |
| Unclear | 1.40 | 1.32 | 1.37 | 1.35 | 1.58 | |
| Vigorous activity (%) | 0.003 | |||||
| No | 74.25 | 74.35 | 73.58 | 72.24 | 76.81 | |
| Yes | 25.75 | 25.65 | 26.42 | 27.76 | 23.19 | |
| Moderate activity (%) | 0.266 | |||||
| No | 54.51 | 53.34 | 54.70 | 54.08 | 56.03 | |
| Yes | 45.49 | 46.66 | 45.30 | 45.92 | 43.97 | |
| Diabetes (%) | < 0.001 | |||||
| No | 86.79 | 96.81 | 92.12 | 85.61 | 71.54 | |
| Yes | 13.21 | 3.19 | 7.88 | 14.39 | 28.46 | |
| Hypertension (%) | < 0.001 | |||||
| No | 61.76 | 76.91 | 65.55 | 58.44 | 44.49 | |
| Yes | 38.24 | 23.09 | 34.45 | 41.56 | 55.51 | |
| High cholesterol (%) | < 0.001 | |||||
| No | 60.03 | 71.69 | 59.46 | 55.91 | 51.77 | |
| Yes | 39.97 | 28.31 | 40.54 | 44.09 | 48.23 | |
| SUI | < 0.001 | |||||
| No | 76.24 | 78.31 | 77.75 | 77.90 | 70.79 | |
| Yes | 23.76 | 21.69 | 22.25 | 22.10 | 29.21 | |
| UUI | < 0.001 | |||||
| No | 79.95 | 83.33 | 80.89 | 80.21 | 75.01 | |
| Yes | 20.05 | 16.67 | 19.11 | 19.79 | 24.99 | |
| MUI | < 0.001 | |||||
| No | 90.41 | 92.96 | 91.18 | 90.18 | 87.03 | |
| Yes | 9.59 | 7.04 | 8.82 | 9.82 | 12.97 | |
Q1–Q4 quartile 1-quartile 4, SE standard error, METS-IR index metabolic score for insulin resistance index, GED general educational development, Family PIR family poverty income ratio, SUI stressed urinary incontinence, UUI urgency urinary incontinence, MUI mixed urinary incontinence