Table 2.
Summary Statistics of Sample Characteristics by Percentiles of Total Health Care Expenditures (unit: 100%, unless noted otherwise)
| Having No Cost | 10th Percentile | 25th Percentile | 50th Percentile | 75th Percentile | 90th Percentile | |
|---|---|---|---|---|---|---|
| Age (year) | 36.02 | 36.49 | 38.00 | 40.63 | 44.57 | 46.05 |
| Female | 0.38 | 0.48 | 0.53 | 0.59 | 0.62 | 0.66 |
| Married | 0.41 | 0.46 | 0.52 | 0.56 | 0.58 | 0.55 |
| Race/ethnicity | ||||||
| White | 0.36 | 0.39 | 0.46 | 0.56 | 0.62 | 0.61 |
| Latino | 0.39 | 0.34 | 0.28 | 0.21 | 0.17 | 0.16 |
| African American | 0.18 | 0.19 | 0.18 | 0.16 | 0.15 | 0.17 |
| Asian | 0.04 | 0.06 | 0.06 | 0.05 | 0.04 | 0.03 |
| Other race | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.03 |
| U.S. citizenship/nativity | ||||||
| U.S.-born | 0.67 | 0.70 | 0.73 | 0.78 | 0.83 | 0.85 |
| U.S.-naturalized | 0.08 | 0.10 | 0.10 | 0.10 | 0.09 | 0.08 |
| Non-U.S. citizens | 0.25 | 0.20 | 0.17 | 0.12 | 0.08 | 0.07 |
| Self-reported health | ||||||
| Excellent | 0.26 | 0.26 | 0.26 | 0.25 | 0.19 | 0.13 |
| Very good | 0.32 | 0.34 | 0.36 | 0.35 | 0.34 | 0.25 |
| Good | 0.32 | 0.30 | 0.29 | 0.29 | 0.31 | 0.32 |
| Fair | 0.09 | 0.09 | 0.08 | 0.09 | 0.12 | 0.20 |
| Poor | 0.01 | 0.01 | 0.01 | 0.02 | 0.04 | 0.11 |
| Self-reported mental health | ||||||
| Excellent | 0.35 | 0.38 | 0.39 | 0.37 | 0.34 | 0.26 |
| Very good | 0.31 | 0.31 | 0.32 | 0.32 | 0.31 | 0.26 |
| Good | 0.29 | 0.26 | 0.25 | 0.25 | 0.27 | 0.30 |
| Fair | 0.04 | 0.05 | 0.04 | 0.05 | 0.07 | 0.13 |
| Poor | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.04 |
| SF12-PCS (1–100) | 52.92 | 52.58 | 52.62 | 51.73 | 49.30 | 43.31 |
| SF12-MCS (1–100) | 50.72 | 50.74 | 50.83 | 50.38 | 49.56 | 47.03 |
| Diabetes | 0.01 | 0.03 | 0.03 | 0.06 | 0.11 | 0.19 |
| Hyperlipidemia | 0.02 | 0.04 | 0.06 | 0.12 | 0.22 | 0.29 |
| Heart disease | 0.00 | 0.00 | 0.00 | 0.01 | 0.02 | 0.06 |
| Hypertension | 0.04 | 0.09 | 0.12 | 0.19 | 0.29 | 0.37 |
| Osteoarthritis | 0.00 | 0.00 | 0.00 | 0.01 | 0.03 | 0.05 |
| Asthma | 0.02 | 0.04 | 0.04 | 0.05 | 0.08 | 0.11 |
| Depressive disorder | 0.05 | 0.05 | 0.05 | 0.08 | 0.14 | 0.22 |
| Anxiety disorder | 0.02 | 0.03 | 0.03 | 0.06 | 0.09 | 0.15 |
| Education | ||||||
| No high school degree | 0.38 | 0.33 | 0.28 | 0.21 | 0.20 | 0.23 |
| High school degree | 0.46 | 0.46 | 0.44 | 0.44 | 0.43 | 0.44 |
| College degree | 0.08 | 0.11 | 0.14 | 0.18 | 0.18 | 0.16 |
| Advanced degree | 0.08 | 0.10 | 0.14 | 0.17 | 0.19 | 0.17 |
| Family income | ||||||
| Low family income (≤100% Federal Poverty line [FPL]) | 0.23 | 0.21 | 0.17 | 0.13 | 0.13 | 0.18 |
| Median family income (100–200% FPL) | 0.30 | 0.27 | 0.23 | 0.18 | 0.16 | 0.18 |
| High family income (>200% FPL) | 0.46 | 0.52 | 0.60 | 0.69 | 0.71 | 0.63 |
| Health insurance | ||||||
| Uninsured | 0.50 | 0.33 | 0.23 | 0.15 | 0.11 | 0.07 |
| Private health insurance | 0.41 | 0.52 | 0.64 | 0.74 | 0.76 | 0.69 |
| Only public health insurance | 0.10 | 0.15 | 0.13 | 0.11 | 0.14 | 0.25 |
| Having usual source of care | 0.39 | 0.63 | 0.71 | 0.80 | 0.87 | 0.89 |
| Unemployed | 0.17 | 0.17 | 0.17 | 0.17 | 0.22 | 0.35 |
| Interviewed in English | 0.75 | 0.79 | 0.84 | 0.89 | 0.92 | 0.93 |
| Urban | 0.85 | 0.84 | 0.85 | 0.84 | 0.84 | 0.82 |
| U.S. Census Region | ||||||
| Northeast | 0.10 | 0.12 | 0.14 | 0.15 | 0.16 | 0.17 |
| Midwest | 0.17 | 0.19 | 0.19 | 0.22 | 0.23 | 0.23 |
| South | 0.41 | 0.40 | 0.39 | 0.37 | 0.36 | 0.37 |
| West | 0.32 | 0.29 | 0.28 | 0.26 | 0.24 | 0.23 |
Source: Medical Expenditure Panel Survey (2005–2006 and 2008–2009); the total sample size was 53,872.