All-cause mortality | n | Cases | Model 1 HR (95% CI)§ | Model 2 HR (95% CI)¶ | Model 3 HR (95% CI)** | Model 4 HR (95% CI)†† |
---|---|---|---|---|---|---|
Car time* | ||||||
Q1 | 925 | 179 | 1.0 | 1.0 | 1.0 | 1.0 |
Q2 | 848 | 153 | 0.96 (0.77 to 1.19) | 0.94 (0.76 to 1.17) | 0.93 (0.74 to 1.16) | 0.92 (0.74 to 1.15) |
Q3 | 637 | 103 | 1.00 (0.79 to 1.28) | 1.02 (0.80 to 1.30) | 1.00 (0.78 to 1.28) | 0.96 (0.75 to 1.23) |
Q4 | 731 | 146 | 1.37 (1.10 to 1.71) | 1.36 (1.09 to 1.70) | 1.31 (1.05 to 1.64) | 1.27 (1.01 to 1.59) |
Linear trend, p value | 0.006 | 0.006 | 0.016 | 0.040 | ||
TV viewing* | ||||||
Q1 | 793 | 125 | 1.0 | 1.0 | 1.0 | 1.0 |
Q2 | 837 | 140 | 1.01 (0.80 to 1.29) | 0.98 (0.77 to 1.25) | 0.94 (0.74 to 1.20) | 0.93 (0.73 to 1.19) |
Q3 | 812 | 179 | 1.28 (1.02 to 1.61) | 1.21 (0.96 to 1.53) | 1.15 (0.91 to 1.45) | 1.13 (0.90 to 1.43) |
Q4 | 699 | 140 | 1.12 (0.88 to 1.43) | 1.07 (0.84 to 1.37) | 1.02 (0.80 to 1.30) | 0.99 (0.77 to 1.27) |
Linear trend, p value | 0.134 | 0.272 | 0.538 | 0.671 | ||
Total sedentary time* | ||||||
Q1 | 895 | 146 | 1.0 | 1.0 | 1.0 | 1.0 |
Q2 | 687 | 116 | 0.99 (0.78 to 1.26) | 0.95 (0.75 to 1.22) | 0.92 (0.72 to 1.18) | 0.92 (0.72 to 1.18) |
Q3 | 845 | 172 | 1.25 (1.00 to 1.56) | 1.20 (0.96 to 1.50) | 1.14 (0.92 to 1.43) | 1.12 (0.89 to 1.40) |
Q4 | 714 | 147 | 1.34 (1.06 to 1.68) | 1.30 (1.03 to 1.63) | 1.22 (0.97 to 1.55) | 1.20 (0.95 to 1.51) |
Linear trend, p value | 0.003 | 0.007 | 0.028 | 0.053 | ||
Cardiorespiratory fitness† | ||||||
Low | 1105 | 262 | 1.0 | 1.0 | 1.0 | 1.0 |
Middle | 1025 | 171 | 0.68 (0.56 to 0.82) | 0.72 (0.59 to 0.87) | 0.73 (0.60 to 0.88) | 0.80 (0.65 to 0.99) |
High | 1011 | 148 | 0.60 (0.49 to 0.73) | 0.66 (0.54 to 0.80) | 0.67 (0.55 to 0.82) | 0.76 (0.59 to 0.97) |
Linear trend, p value | <0.001 | <0.001 | 0.030 | 0.030 |
*Total sedentary time (ie, the sum of reported TV viewing and car time) was categorised into sample-specific quartiles (Q): Q1 (0–10 h/week), Q2 (11–15 h/week), Q3 (16–22 h/week) and Q4 (≥23 h/week). Quartiles of car time: (Q): Q1 (0–4 h/week), Q2 (5–7 h/week), Q3 (8–10 h/week) and Q4 (≥11 h/week). Quartiles of TV viewing: (Q): Q1 (0–3 h/week), Q2 (4–7 h/week), Q3 (8–12 h/week) and Q4 (≥13 h/week).
†Cardiorespiratory fitness was categorised into age (20–39, 40–49, 50–59 and ≥60 years) and gender-specific tertiles based on the distribution of the sample.
‡Cox proportional hazard models were utilised to estimate the HR and 95% CIs.
§Adjusted for age and gender.
¶Adjusted for age, gender, current smoking, alcohol, personal history of hypertension, personal history of diabetes and family history of CVD.
**Adjusted for age, gender, current smoking, alcohol, personal history of hypertension, personal history of diabetes, family history of CVD and cardiorespiratory fitness or sedentary time.
††Adjusted for age, gender, current smoking, alcohol, personal history of hypertension, personal history of diabetes, family history of CVD, cardiorespiratory fitness or sedentary time, physical activity, BMI, total cholesterol, systolic blood pressure and glucose.
BMI, body mass index; CVD, cardiovascular disease; PY, person years; Q, quartile; TV, television.