Table 2.
Key stage (KS) achievement at KS1 (age 7), KS2 (age 11), KS3 (age 14) and KS4 (age 16) (male and female), free school meal eligibility and mental health problem and drug rate
| Male | Female | |
|---|---|---|
| Exposure variables, % (n/N) | ||
| Age 7 achieved | 77.5 (129 884/167 599) | 86.10 (136 685/158 751) |
| Age 11 achieved | 73.1 (128 587/175 924) | 80.92 (135 799/167 829) |
| Age 14 achieved | 57.9 (108 881/188 172) | 67 46 (121 859/180 637) |
| Age 16 achieved | 37.7 (54 620/144 795) | 42.5 (61 162/143 879) |
| Free school meals at age 7 | 19.4 (32 452/167 496) | 19.8 (31 427/158 644) |
| Free school meals at age 11 | 18.7 (32 921/175 860) | 19.1 (32 023/167 773) |
| Free school meals at age 14 | 17.2 (32 411/188 133) | 17.2 (31 093/180 606) |
| Free school meals at age 16 | 13.9 (20 018/144 222) | 14.0 (20 141/143 349) |
| Outcome variables | ||
| Depression, % (n/N) | 3.27 (10 458/319 839) | 7.49 (23 040/307 584) |
| Age, mean (s.d) | 19.17 (3.18) | 18.72 (2.91) |
| Depression in primary school, % (n/N) | 0.10 (315/319 839) | 0.09 (290/307 584) |
| Depression in primary school as a per cent of all cases of depression, % (n/N) | 3.0 (315/10 458) | 1.25 (290/23 040) |
| Self-harm, % (n/N) | 1.48 (4736/319 839) | 3.64 (11 210/307 584) |
| Average age, mean (s.d.) | 17.46 (3.81) | 16.42 (2.89) |
| Self-harm in primary school, % (n/N) | 0.11 (362/319 839) | 0.11 (330/307 584) |
| Self-harm in primary school as a per cent of all cases of self-harm, % | 7.6 (362/4746) | 3.2 (330/11 210) |
| Confounding variables | ||
| ADHD, % (n/N) | 1.81 (5782/319 839) | 0.55 (1689/307 584) |
| Age, mean (s.d.) | 10.00 (3.63) | 12.23 (4.75) |
| ADHD in primary school, % (n/N) | 1.34 (4301/319 839) | 0.29 (895/307 584) |
| ADHD in primary school as a per cent of all cases of ADHD, % | 74 (4301/5782) | 53 (895/1689) |
| Conduct disorder | 3.55(11 341/319 839) | 1.70 (685/307 584) |
| Average age, mean (s.d.) | 9.73 (3.47) | 12.41 (4.68) |
| Stimulants in primary school, % (n/N) | 2.71 (8672/319 839) | 0.88 (2719/307 584) |
| Stimulants in primary school as a per cent of all cases of stimulant use, % | 76.5 (8672/11 341) | 51.9 (2719/5238) |
| Intellectual disability, % (n/N) | 0.33 (1042/319 839) | 0.18 (541/307 584) |
| Age, mean (s.d.) | 13.77 (5.11) | 14.55 (5.08) |
| Intellectual disability in primary school, % (n/N) | 0.14 (438/319 839) | 0.05 (158/307 584) |
| Intellectual disability in primary school as a per cent of all cases of intellectual disability, % | 42 (438/1042) | 29 (158/541) |
| Hypnotic, % (n/N) | 1.19 (3800/31 839) | 1.52 (4674/307 584) |
| Average age, mean (s.d.) | 17.58 (5.43) | 19.64 (3.94) |
| Hypnotic in primary school, % (n/N) | 0.24 (756/319 839) | 0.09 (271/307 584) |
| Hypnotic in primary school as a per cent of all cases of hypnotic use, % | 19.9 (756/3800) | 5.8 (271/4674) |
| Stimulants, % (n/N) | 1.27 (4051/319 839) | 0.28 (850/307 584) |
| Age, mean (s.d.) | 10.67 (3.32) | 11.78 (3.98) |
| Stimulants in primary school, % (n/N) | 0.86 (2747/319 839) | 0.16 (490/307 584) |
| Stimulants in primary school as a per cent of all cases of stimulant use, % | 67.8 (2747/4051) | 57.6 (490/850) |
ADHD, attention-deficit hyperactivity disorder.