Table 2.
Coefficients from conditional quantile regression models on body mass index (BMI) among women (N = 10,838), 2008–2012
| Characteristic | 10th Quantile | 25th Quantile | 50th Quantile | 75th Quantile | 90th Quantile |
|---|---|---|---|---|---|
| Model 1: | |||||
| Educational attainment (middle school or less)a | |||||
| High school | −0.52(0.11)** | −0.60(0.11)** | −0.80(0.14)** | −0.75(0.14)** | −0.84(0.17)** |
| College and above | −1.07(0.14)** | −1.25(0.12)** | −1.56(0.15)** | −2.05(0.19)** | −2.42(0.20)** |
| Goodness of fit: R1(τ) | 0.08 | 0.10 | 0.07 | 0.05 | 0.03 |
| Model 2: | |||||
| Educational attainment (middle school or less)a | |||||
| High school | −0.57(0.11)** | −0.65(0.10)** | −0.74(0.12)** | −0.62(0.15)** | −0.58(0.20)** |
| College and above | −1.04(0.14)** | −1.25(0.15)** | −1.39(0.10)** | −1.70(0.14)** | −1.99(0.22)** |
| Household income (logged) | −0.03(0.04) | 0.05(0.04) | −0.04(0.03) | −0.27(0.06)** | −0.48(0.08)** |
| Occupational status (manual worker) | |||||
| Professional | 0.09(0.18) | 0.17(0.16) | −0.05(0.14) | −0.08(0.20) | 0.14(0.29) |
| Clerical/service/sales | 0.32(0.12)* | 0.27(0.12)* | 0.02(0.11) | 0.16(0.12) | 0.26(0.21) |
| Not in the labor force | 0.16(0.09) | 0.14(0.08) | −0.11(0.10) | −0.03(0.10) | 0.15(0.17) |
| Goodness of fit: R1(τ) | 0.09 | 0.10 | 0.07 | 0.06 | 0.04 |
| Model 3: | |||||
| Educational attainment (middle school or less)a | |||||
| High school | −0.59(0.10)** | −0.61(0.09)** | −0.71(0.11)** | −0.57(0.13)** | −0.49(0.21)* |
| College and above | −1.04(0.11)** | −1.20(0.11)** | −1.32(0.12)** | −1.63(0.16)** | −1.81(0.21)** |
| Household income (logged) | −0.04(0.05) | 0.01(0.03) | −0.04 (0.03) | −0.26(0.06)** | −0.46(0.05)** |
| Occupational status (manual worker) | |||||
| Professional | 0.14(0.19) | 0.12(0.15) | −0.08(0.15) | −0.05(0.20) | 0.04(0.35) |
| Clerical/service/sales | 0.35(0.13)** | 0.18(0.11) | 0.05(0.12) | 0.12(0.12) | 0.17(0.20) |
| Not in the labor force | 0.39(0.22) | 0.29(0.14)* | 0.02(0.13) | 0.24(0.21) | 0.48(0.22)* |
| Health behaviors | |||||
| Hours of work | 0.03(0.02) | 0.03 (0.03) | 0.02(0.02) | 0.05(0.02)* | 0.05 (0.02)* |
| Smoking (non-smoker) | |||||
| Current smoker | −0.40(0.11)** | −0.33(0.15)* | −0.23(0.15) | −0.03(0.23) | 0.29(0.48) |
| Former smoker | 0.12(0.10) | 0.32(0.18) | 0.44(0.18)* | 0.31(0.28) | 0.20(0.32) |
| Drinking (never) | |||||
| Light drinker | 0.19(0.08)* | 0.22(0.08)** | 0.05(0.10) | −0.10(0.12) | 0.00(0.15) |
| Light and frequent drinker | 0.33(0.08)** | 0.37(0.08)** | 0.28(0.12)* | 0.05(0.13) | 0.27(0.23) |
| Moderate drinker | 0.48(0.13)** | 0.52(0.13)** | 0.31(0.17) | 0.27(0.25) | 0.25(0.36) |
| Heavy drinker (60–80 g ethanol/a day) | 0.53(0.24)* | 0.40(0.20) | 0.47(0.30) | 0.43(0.30) | 0.59(0.56) |
| Binge drinker (> 80 g ethanol/a day) | 0.61(0.22)** | 0.92(0.31)** | 1.15(0.20)** | 1.40(0.44)** | 2.04(0.70)** |
| Goodness of fit: R1(τ) | 0.09 | 0.10 | 0.08 | 0.06 | 0.04 |
p-value ** < 0.01; * < 0.05. Age, survey year, marital status, self-rated health, region of residence, and parental education are controlled for in the model 2 and 3. Bootstrap standard errors are in parentheses
aOmitted category is shown in parenthesis