Females | Males | |||||
---|---|---|---|---|---|---|
2011 Mean (95% CI) | 2015 Mean (95% CI) | F(df) [p; η 2] | 2011 Mean (95% CI) | 2015 Mean (95% CI) | F(df) [p; η 2] | |
All | 21.44 (21.18–21.69) | 22.93 (22.71–23.16) | 73.99(1, 3978) [.001; .018] | 23.97 (23.72–24.23) | 25.22 (24.99–25.45) | 50.81(1, 4029) [.001; .012] |
Age | ||||||
15–17 years | 20.87 (19.66–22.08) | 21.32 (20.32–22.33) | 0.33(1, 164) [.564; .000] | 23.53 (22.07–24.98) | 23.32 (22.14–24.50) | 0.05(1, 154) [.824; .000] |
18–24 years | 21.74 (21.06–22.43) | 22.55 (21.95–23.16) | 3.07(1, 458) [.081; .007] | 24.30 (23.64–24.95) | 25.86 (25.23–26.49) | 11.47(1, 514) [.001; .021] |
25–34 years | 22.67 (22.07–23.27) | 24.28 (23.74–24.82) | 15.54 (1, 664) [≤.001; .023] | 25.38 (24.79–25.97) | 26.40 (25.86–26.93) | 6.25(1, 674) [.013; .009] |
35–44 years | 21.38 (20.75–22.01) | 23.53 (22.92–24.15) | 22.57 (1, 631) [≤.001; .035] | 24.52 (23.91–25.13) | 25.82 (25.27–26.36) | 9.68(1, 652) [.002; .014] |
45–54 years | 21.85 (21.24–22.47) | 23.30 (22.73–23.87) | 11.42 (1, 678) [.001; .017] | 24.38 (23.82–24.94) | 25.21 (24.65–25.77) | 4.13(1, 718) [.042; .006] |
55–64 years | 20.70 (20.13–21.28) | 22.41 (21.90–22.93) | 19.02 (1, 789) [≤.001; .024] | 22.56 (21.98–23.15) | 24.77 (24.22–25.32) | 28.83 (1, 773) [≤.001; .035] |
65–74 years | 20.05 (19.32–20.78) | 22.02 (21.48–22.55) | 17.94 (1, 578) [≤.001; .030] | 22.44 (21.67–23.21) | 23.85 (23.26–24.44) | 8.06(1, 530) [.005; .015] |