Table 2. Hazard ratios for all-cause, cardiovascular, and cancer mortality by milk intake frequency, 1988–2009, JACC study.
Men (n = 39 639) | Women (n = 55 341) | |||||||||||
Never | 1–2 times/month | 1–2 times/week | 3–4 times/week | Almost everyday | Trend P |
Never | 1–2 times/month | 1–2 times/week | 3–4 times/week | Almost everyday | Trend P | |
Person-years | 136 234 | 56 739 | 97 564 | 92 621 | 254 225 | 174 369 | 60 289 | 129 819 | 140 478 | 421 483 | ||
All-cause mortality | ||||||||||||
Number of deaths | 2813 | 951 | 1669 | 1547 | 5223 | 2137 | 594 | 1215 | 1206 | 4420 | ||
Age-adjusted mortality ratea | 16.4 | 14.6 | 14.7 | 14.5 | 14.4 | 7.2 | 6.7 | 6.9 | 6.4 | 6.5 | ||
Age-adjusted HR (95% CI)b | 1 | 0.89 (0.82–0.95) | 0.88 (0.83–0.94) | 0.85 (0.79–0.90) | 0.86 (0.83–0.91) | <0.01 | 1 | 0.97 (0.89–1.06) | 0.95 (0.89–1.02) | 0.88 (0.82–0.95) | 0.91 (0.87–0.96) | <0.01 |
Multivariable-adjusted HR (95% CI)c | 1 | 0.92 (0.86–0.99) | 0.91 (0.85–0.96) | 0.89 (0.84–0.96) | 0.93 (0.89–0.98) | 0.09 | 1 | 1.00 (0.91–1.05) | 0.98 (0.91–1.05) | 0.91 (0.85–0.98) | 0.96 (0.91–1.01) | 0.15 |
Cardiovascular mortality | ||||||||||||
Number of deaths | 733 | 272 | 423 | 406 | 1356 | 695 | 210 | 402 | 359 | 1419 | ||
Age-adjusted mortality ratea | 3.8 | 3.7 | 3.4 | 3.4 | 3.2 | 1.8 | 1.8 | 1.8 | 1.6 | 1.6 | ||
Age-adjusted HR (95% CI)b | 1 | 0.97 (0.85–1.12) | 0.86 (0.77–0.97) | 0.86 (0.76–0.97) | 0.84 (0.77–0.92) | <0.01 | 1 | 1.09 (0.94–1.27) | 1.01 (0.89–1.14) | 0.85 (0.75–0.97) | 0.92 (0.84–1.02) | 0.01 |
Multivariable-adjusted HR (95% CI)c | 1 | 0.98 (0.85–1.13) | 0.86 (0.77–0.98) | 0.89 (0.79–1.01) | 0.89 (0.82–0.98) | 0.06 | 1 | 1.14 (0.98–1.33) | 1.03 (0.91–1.17) | 0.88 (0.78–1.01) | 0.99 (0.89–1.08) | 0.32 |
Cancer mortality | ||||||||||||
Number of deaths | 1118 | 356 | 659 | 576 | 1994 | 624 | 159 | 373 | 407 | 1422 | ||
Age-adjusted mortality ratea | 7.3 | 6.0 | 6.4 | 5.9 | 6.3 | 2.9 | 2.4 | 2.7 | 2.7 | 2.8 | ||
Age-adjusted HR (95% CI)b | 1 | 0.84 (0.74–0.94) | 0.88 (0.80–0.98) | 0.79 (0.72–0.88) | 0.86 (0.79–0.93) | <0.01 | 1 | 0.83 (0.70–0.99) | 0.93 (0.82–1.06) | 0.93 (0.82–1.06) | 0.97 (0.88–1.06) | 0.73 |
Multivariable-adjusted HR (95% CI)c | 1 | 0.88 (0.78–0.99) | 0.90 (0.82–0.99) | 0.85 (0.76–0.94) | 0.94 (0.87–1.01) | 0.56 | 1 | 0.85 (0.72–1.02) | 0.95 (0.83–1.08) | 0.95 (0.84–1.08) | 1.00 (0.91–1.11) | 0.28 |
CI, confidence interval; HR, hazard ratio.
aAge-adjusted mortality was calculated using Poisson regression model and expressed as rate per 1000 person-years.
bAge-adjusted HR: adjusted for age categories (5-year age groups).
cMultivariable-adjusted HR: adjusted for age categories, smoking status, drinking status, physical activity, sleeping duration, body mass index, education level, participation in health checkups, green-leafy vegetable intake, and history of hypertension, diabetes, and liver disease.