Table 3.
Interaction effect test (Omega-3).
| Characteristic | Q1 | Q2 | P | Q3 | P | Q4 | P | P for trend | P for interaction |
|---|---|---|---|---|---|---|---|---|---|
| Gender | 0.03 | ||||||||
| Female | ref | −0.58 (−0.84, −0.31) | <0.0001 | −0.4 (−0.63, −0.17) | <0.001 | −0.49 (−0.71, −0.26) | <0.0001 | <0.001 | |
| Male | ref | −0.08 (−0.37, 0.21) | 0.57 | −0.23 (−0.52, 0.05) | 0.10 | −0.34 (−0.63, −0.05) | 0.02 | 0.1 | |
| Age | 0.02 | ||||||||
| 20–29 | ref | −0.21 (−0.60, 0.18) | 0.29 | −0.27 (−0.61, 0.06) | 0.11 | −0.43 (−0.82, −0.04) | 0.03 | 0.46 | |
| 30–39 | ref | −0.39 (−0.74, −0.03) | 0.03 | −0.28 (−0.67, 0.11) | 0.16 | −0.49 (−0.92, −0.06) | 0.03 | 0.18 | |
| 40–49 | ref | −0.21 (−0.65, 0.24) | 0.36 | 0.1 (−0.33, 0.52) | 0.66 | 0.17 (−0.25, 0.58) | 0.42 | 0.13 | |
| 50–59 | ref | −0.15 (−0.60, 0.30) | 0.50 | −0.03 (−0.47, 0.42) | 0.91 | −0.06 (−0.50, 0.38) | 0.78 | 0.97 | |
| ≥60 | ref | −0.52 (−0.88, −0.17) | 0.004 | −0.9 (−1.32, −0.49) | <0.0001 | −0.96 (−1.36, −0.56) | <0.0001 | <0.001 | |
| Race | 0.01 | ||||||||
| Non-Hispanic White | ref | −0.35 (−0.59, −0.11) | 0.01 | −0.39 (−0.65, −0.13) | 0.003 | −0.46 (−0.71, −0.22) | <0.001 | 0.96 | |
| Mexican American | ref | −0.34 (−0.72, 0.03) | 0.07 | −0.25 (−0.68, 0.17) | 0.24 | −0.41 (−0.83, 0.01) | 0.05 | 0.33 | |
| Non-Hispanic Black | ref | −0.24 (−0.63, 0.16) | 0.23 | −0.38 (−0.80, 0.03) | 0.07 | −0.56 (−0.97, −0.14) | 0.01 | 0.25 | |
| Other Race | ref | 0.02 (−0.44, 0.48) | 0.95 | 0.49 (0.03, 0.96) | 0.04 | 0.31 (−0.15, 0.77) | 0.18 | 0.58 | |
| Education | 0.56 | ||||||||
| Below | ref | −0.59 (−0.98, −0.19) | 0.005 | −0.4 (−0.82, 0.02) | 0.06 | −0.23 (−0.69, 0.23) | 0.32 | 0.004 | |
| High School | ref | −0.25 (−0.68, 0.17) | 0.24 | −0.28 (−0.66, 0.11) | 0.16 | −0.61 (−0.97, −0.25) | 0.001 | 0.25 | |
| Above | ref | −0.26 (−0.51, −0.01) | 0.04 | −0.29 (−0.52, −0.06) | 0.02 | −0.34 (−0.57, −0.11) | 0.004 | 0.06 | |
| PIR | 0.11 | ||||||||
| <1.3 | ref | −0.13 (−0.48, 0.23) | 0.48 | −0.23 (−0.57, 0.12) | 0.19 | −0.24 (−0.57, 0.09) | 0.15 | 0.46 | |
| 1.3–3.49 | ref | −0.47 (−0.79, −0.15) | 0.004 | −0.21 (−0.50, 0.07) | 0.15 | −0.66 (−0.96, −0.36) | <0.0001 | <0.0001 | |
| ≥3.5 | ref | −0.22 (−0.52, 0.07) | 0.14 | −0.35 (−0.67, −0.04) | 0.03 | −0.24 (−0.52, 0.05) | 0.10 | 0.49 | |
| BMI | 0.82 | ||||||||
| <25 | ref | −0.24 (−0.57, 0.08) | 0.14 | −0.28 (−0.61, 0.05) | 0.10 | −0.35 (−0.66, −0.04) | 0.03 | 0.17 | |
| 25–29.9 | ref | −0.48 (−0.77, −0.18) | 0.002 | −0.33 (−0.60, −0.06) | 0.02 | −0.53 (−0.83, −0.24) | <0.001 | 0.03 | |
| ≥30 | ref | −0.21 (−0.52, 0.11) | 0.19 | −0.33 (−0.67, 0.01) | 0.06 | −0.33 (−0.67, 0.00) | 0.05 | 0.27 | |
| Marital status | 0.43 | ||||||||
| Widowed/divorced/separated | ref | −0.25 (−0.47, −0.03) | 0.03 | −0.28 (−0.52, −0.04) | 0.02 | −0.35 (−0.57, −0.13) | 0.002 | 0.1 | |
| Never married | ref | −0.33 (−0.76, 0.10) | 0.13 | −0.55 (−0.98, −0.12) | 0.01 | −0.4 (−0.85, 0.06) | 0.09 | 0.17 | |
| Married/living with partner | ref | −0.42 (−0.86, 0.03) | 0.06 | −0.09 (−0.50, 0.33) | 0.68 | −0.57 (−0.95, −0.18) | 0.005 | 0.002 | |
| Smoke status | 0.85 | ||||||||
| Former smoker | ref | −0.41 (−0.81, 0.00) | 0.05 | −0.34 (−0.75, 0.06) | 0.10 | −0.49 (−0.91, −0.07) | 0.02 | 0.05 | |
| Nonsmoker | ref | −0.35 (−0.71, 0.02) | 0.06 | −0.19 (−0.56, 0.17) | 0.30 | −0.35 (−0.73, 0.03) | 0.07 | 0.14 | |
| Current smoker | ref | −0.22 (−0.48, 0.03) | 0.08 | −0.32 (−0.57, −0.07) | 0.01 | −0.38 (−0.64, −0.12) | 0.005 | 0.02 | |
| Alcohol status | 0.16 | ||||||||
| Former | ref | −0.49 (−1.03, 0.04) | 0.07 | −0.37 (−0.93, 0.18) | 0.19 | −0.73 (−1.22, −0.24) | 0.004 | 0.04 | |
| Never | ref | −0.19 (−0.74, 0.36) | 0.50 | −0.7 (−1.25, −0.14) | 0.01 | −0.11 (−0.69, 0.47) | 0.70 | 0.2 | |
| Mild | ref | −0.41 (−0.67, −0.15) | 0.002 | −0.33 (−0.63, −0.03) | 0.03 | −0.37 (−0.61, −0.12) | 0.004 | 0.06 | |
| Moderate | ref | 0.14 (−0.27, 0.54) | 0.50 | −0.11 (−0.51, 0.29) | 0.58 | −0.16 (−0.57, 0.25) | 0.44 | 0.16 | |
| Heavy | ref | −0.42 (−0.84, −0.01) | 0.04 | −0.25 (−0.64, 0.14) | 0.20 | −0.61 (−1.02, −0.20) | 0.004 | 0.2 | |
| Physical activity | 0.87 | ||||||||
| Q1 | ref | −0.26 (−0.55, 0.03) | 0.08 | −0.24 (−0.59, 0.10) | 0.16 | −0.41 (−0.72, −0.10) | 0.01 | 0.53 | |
| Q2 | ref | −0.24 (−0.56, 0.08) | 0.14 | −0.31 (−0.68, 0.07) | 0.10 | −0.48 (−0.81, −0.15) | 0.005 | 0.03 | |
| Q3 | ref | −0.44 (−0.81, −0.07) | 0.02 | −0.37 (−0.68, −0.06) | 0.02 | −0.32 (−0.66, 0.01) | 0.06 | 0.65 | |
| Healthy eating index | 0.1 | ||||||||
| Q1 | ref | −0.3 (−0.59, 0.00) | 0.05 | −0.16 (−0.46, 0.14) | 0.30 | −0.35 (−0.64, −0.07) | 0.01 | 0.02 | |
| Q2 | ref | −0.28 (−0.62, 0.06) | 0.10 | −0.09 (−0.43, 0.24) | 0.58 | −0.4 (−0.75, −0.05) | 0.02 | 0.54 | |
| Q3 | ref | −0.32 (−0.66, 0.01) | 0.06 | −0.68 (−1.00, −0.35) | <0.0001 | −0.49 (−0.82, −0.16) | 0.004 | 0.03 | |
| Diabetes | 0.72 | ||||||||
| Yes | ref | −0.3 (−0.51, −0.10) | 0.004 | −0.34 (−0.54, −0.13) | 0.002 | −0.39 (−0.59, −0.20) | <0.001 | 0.18 | |
| No | ref | −0.26 (−0.75, 0.23) | 0.30 | −0.08 (−0.66, 0.50) | 0.78 | −0.42 (−0.94, 0.10) | 0.11 | 0.52 | |
| Hyperlipidemia | 0.19 | ||||||||
| Yes | ref | −0.38 (−0.61, −0.14) | 0.002 | −0.38 (−0.61, −0.15) | 0.002 | −0.53 (−0.74, −0.31) | <0.0001 | 0.22 | |
| No | ref | −0.11 (−0.45, 0.22) | 0.50 | −0.08 (−0.44, 0.27) | 0.63 | −0.08 (−0.39, 0.23) | 0.61 | 0.53 | |
| Hypertension | 0.002 | ||||||||
| Yes | ref | −0.66 (−0.97, −0.35) | <0.0001 | −0.45 (−0.80, −0.11) | 0.01 | −0.81 (−1.11, −0.51) | <0.0001 | 0.93 | |
| No | ref | −0.11 (−0.36, 0.14) | 0.37 | −0.21 (−0.44, 0.02) | 0.07 | −0.18 (−0.42, 0.06) | 0.15 | 0.26 | |
| Cancer | 0.39 | ||||||||
| Yes | ref | −0.27 (−0.47, −0.07) | 0.01 | −0.28 (−0.48, −0.07) | 0.01 | −0.42 (−0.62, −0.21) | <0.0001 | 0.26 | |
| No | ref | −0.72 (−1.35, −0.08) | 0.03 | −0.62 (−1.29, 0.04) | 0.07 | −0.27 (−0.86, 0.32) | 0.37 | 0.37 |