Change in odds per year (95% CI)2 | Odds ratio (95% CI)2, compared to 1993 | ||||||
---|---|---|---|---|---|---|---|
1993 | 1995 | 1997 | 1999 | 2001 | 2003 | ||
All | 0.99 (0.98 to 1.00) | 1.00 | 0.91 (0.78 to 1.07) | 0.92 (0.82 to 1.03) | 0.96 (0.85 to 1.07) | 0.95 (0.86 to 1.05) | 0.87 (0.77 to 0.98)* |
Gender | |||||||
Girls | 1.01 (0.99 to 1.02) | 1.00 | 0.85 (0.69 to 1.05) | 0.90 (0.75 to 1.08) | 1.04 (0.90 to 1.19) | 1.04 (0.90 to 1.19) | 0.96 (0.82 to 1.11) |
Boys | 0.98 (0.97 to 0.99)* | 1.00 | 0.98 (0.85 to 1.14) | 0.88 (0.77 to 1.01) | 0.88 (0.74 to 1.06) | 0.90 (0.79 to 1.02) | 0.79 (0.68 to 0.91)* |
School grade | |||||||
9 | 0.98 (0.96 to 0.99)* | 1.00 | 0.86 (0.64 to 1.15) | 0.91 (0.73 to 1.13) | 0.90 (0.68 to 1.20) | 0.88 (0.71 to 1.07) | 0.74 (0.60 to 0.92)* |
10 | 0.98 (0.96 to 0.99)* | 1.00 | 0.99 (0.79 to 1.25) | 0.85 (0.71 to 1.01) | 0.80 (0.65 to 0.99)* | 0.89 (0.76 to 1.04) | 0.81 (0.66 to 0.99)* |
11 | 0.99 (0.98 to 1.01) | 1.00 | 0.91 (0.70 to 1.17) | 0.90 (0.74 to 1.09) | 0.83 (0.72 to 0.97)* | 0.95 (0.81 to 1.11) | 0.90 (0.77 to 1.06) |
12 | 1.00 (0.98 to 1.01) | 1.00 | 0.89 (0.76 to 1.05) | 0.99 (0.81 to 1.20) | 1.16 (0.95 to 1.42) | 0.91 (0.77 to 1.08) | 0.89 (0.76 to 1.04) |
Race | |||||||
NHW 3 | 0.99 (0.98 to 1.00) | 1.00 | 0.97 (0.78 to 1.20) | 0.96 (0.82 to 1.13) | 0.98 (0.86 to 1.13) | 0.95 (0.85 to 1.06) | 0.89 (0.77 to 1.04) |
Black 4 | 0.99 (0.98 to 1.01) | 1.00 | 0.76 (0.61 to 0.94)* | 0.78 (0.64 to 0.95) | 0.83 (0.66 to 1.06) | 0.99 (0.78 to 1.24) | 0.81 (0.65 to 1.00) |
HW 5 | 1.00 (0.98 to 1.02) | 1.00 | 0.92 (0.71 to 1.19) | 1.04 (0.81 to 1.34) | 0.97 (0.72 to 1.32) | 0.98 (0.77 to 1.26) | 0.96 (0.76 to 1.23) |
Other | 1.00 (0.98 to 1.02) | 1.00 | 0.92 (0.68 to 1.26) | 0.84 (0.63 to 1.13) | 0.98 (0.73 to 1.32) | 0.93 (0.73 to 1.18) | 0.91 (0.73 to 1.13) |