Male | Female | |||||
School year (and age, y) | Rural | Metropolitan | All | Rural | Metropolitan | All |
1 (6) | 85.30 ± 15.69 (17, 151) | 87.33 ± 15.81 (62, 1297) | 86.90 ± 15.71 (79, 1448) | 71.61 ± 19.79 (16, 139) | 78.00 ± 14.41 (68, 1392) | 76.78 ± 15.64 (84, 1531) |
2 (7) | 86.38 ± 14.34 (18, 187) | 87.67 ± 16.01 (68, 1363) | 87.40 ± 15.61 (86, 1550) | 76.50 ± 15.19 (18, 174) | 84.23 ± 15.70 (74, 1499) | 82.71 ± 15.82 (92, 1673) |
3 (8) | 88.97 ± 13.87 (18, 173) | 90.30 ± 14.08 (80, 1710) | 90.06 ± 13.98 (98, 1883) | 84.52 ± 17.43 (18, 162) | 86.47 ± 14.38 (85, 1777) | 86.13 ± 14.88 (103, 1939) |
4 (9) | 91.83 ± 14.88 (19, 199) | 89.94 ± 13.51 (75, 1524) | 90.32 ± 13.74 (94, 1723) | 83.95 ± 14.01 (18, 139) | 89.86 ± 13.46 (82, 1644) | 88.80 ± 13.68 (100, 1783) |
5 (10) | 93.70 ± 16.22 (17, 154) | 91.69 ± 14.68 (77, 1544) | 92.05 ± 14.90 (94, 1698) | 89.33 ± 12.00 (17, 138) | 88.94 ± 14.33 (85, 1793) | 89.01 ± 13.92 (102, 1931) |
6 (11) | 92.98 ± 15.80 (16, 131) | 91.74 ± 13.31 (72, 1465) | 91.96 ± 13.70 (88, 1596) | 91.04 ± 12.70 (16, 130) | 91.54 ± 11.98 (79, 1773) | 91.45 ± 12.04 (95, 1903) |
7 (12) | 93.34 ± 17.54 (16, 118) | 91.44 ± 12.47 (68, 1367) | 91.80 ± 13.48 (84, 1485) | 95.72 ± 15.72 (15, 114) | 92.46 ± 12.72 (75, 1753) | 93.00 ± 13.22 (90, 1867) |
1 - 7 (6 - 12) | 90.29 ± 15.41 (121, 1113) | 90.10 ± 14.29 (502, 10,270) | 90.14 ± 14.51 (623, 11,383) | 84.46 ± 16.86 (118, 996) | 87.56 ± 14.51 (548, 11,631) | 87.01 ± 14.99 (666, 12,627) |