Table 2.
1974 | 1984 | 1994 | Change in prevalence (95% CI)
|
||
---|---|---|---|---|---|
1974 to 1984 | 1984 to 1994 | ||||
English boys | |||||
No | 4139 | 3259 | 3016 | ||
Age (years): | |||||
4 to 6 | 6.8 | 4.6 | 5.4 | −2.2 (−4.1 to −0.2) | 0.7 (−1.2 to 2.7) |
7 to 8 | 6.2 | 5.7 | 9.0 | −0.5 (−2.5 to 1.6) | 3.3 (0.8 to 5.7) |
9 to 11 | 6.2 | 5.8 | 12.7 | −0.4 (−2.2 to 1.4) | 6.9 (4.4 to 9.4) |
Total | 6.4 | 5.4 | 9.0 | −1.0 (−2.1 to 0.1) | 3.6 (2.3 to 5.0) |
English girls | |||||
No | 3871 | 3008 | 2858 | ||
Age (years): | |||||
4 to 6 | 9.5 | 7.5 | 10.9 | −2.1 (−4.6 to 0.4) | 3.4 (0.7 to 6.1) |
7 to 8 | 7.6 | 10.6 | 12.5 | 3.0 (0.3 to 5.6) | 1.9 (−1.3 to 5.1) |
9 to 11 | 9.9 | 9.9 | 16.7 | 0.0 (−2.4 to 2.3) | 6.9 (3.8 to 10.0) |
Total | 9.1 | 9.3 | 13.5 | 0.3 (−1.2 to 1.7) | 4.1 (2.4 to 5.9) |
Scottish boys | |||||
No | 1172 | 2141 | 2072 | ||
Age (years): | |||||
4 to 6 | 7.0 | 5.7 | 7.6 | −1.3 (−4.5 to 1.9) | 1.9 (−0.9 to 4.8) |
7 to 8 | 4.2 | 6.4 | 8.0 | 2.2 (−0.8 to 5.3) | 1.6 (−1.5 to 4.7) |
9 to 11 | 5.0 | 6.9 | 13.4 | 1.9 (−0.7 to 4.6) | 6.5 (3.5 to 9.5) |
Total | 5.4 | 6.4 | 10.0 | 1.0 (−0.1 to 2.7) | 3.6 (1.9 to 5.4) |
Scottish girls | |||||
No | 1078 | 2105 | 2036 | ||
Age (years): | |||||
4 to 6 | 10.1 | 9.3 | 11.9 | −0.8 (−5.0 to 3.4) | 2.5 (−1.1 to 6.1) |
7 to 8 | 7.0 | 11.3 | 15.1 | 4.2 (0.1 to 8.3) | 3.8 (−0.4 to 8.0) |
9 to 11 | 9.1 | 10.6 | 19.6 | 1.5 (−1.9 to 5.0) | 9.0 (5.3 to 12.7) |
Total | 8.8 | 10.4 | 15.8 | 1.6 (−0.7 to 3.8) | 5.4 (3.2 to 7.6) |