Reading skills | Immediately after the interventiona | One-year follow-upa | Change from first to second testa | ||||||
---|---|---|---|---|---|---|---|---|---|
 | Control schools No. of children 4412 n (%) | Intervention schools No. of children 5711 n (%) | Diff | Control schools No. of children 2844 n (%) | Intervention schools No. of children 3943 n (%) | Diff | Control schools | Intervention schools | Diff |
Lacking basic reading skills | 2139 (48.5%) | 2224 (38.9%) | −9.5% | 893 (31.4%) | 882 (22.4%) | −9.0% | −17.1% | −16.6% | 0.5% |
Basic reading skills | 1507 (34.2%) | 2155 37.7% | 3.6% | 1093 (38.4%) | 1579 (40.0%) | 1.6% | 4.3% | 2.3% | −2.0% |
Advanced reading skills | 766 (17.4%) | 1332 23.3% | 6.0% | 858 (30.2%) | 1482 (37.6%) | 7.4% | 12.8% | 14.3% | 1.5% |