Table 2.
Cases | Controls | |||
---|---|---|---|---|
IQ | N | N (%) w/services | N | N (%) w/services |
80–89 | 20 | 16 (80.0%) | 10 | 3 (30.0%) |
90–99 | 39 | 23 (59.0%) | 28 | 9 (32.1%) |
100–109 | 31 | 13 (41.9%) | 51 | 11 (21.6%) |
110–119 | 31 | 7 (22.6%) | 24 | 1 (4.2%) |
≥120 | 21 | 5 (23.8%) | 29 | 1 (3.5%) |
P<0.0001 (trend) | P<0.0001 (trend) |