Infancy ≤1 year of age n=18 |
No association between IQ and BF |
9 (50) |
A—3 (33.3) |
B—3 (33.3) |
C—3 (33.3) |
Positive association between IQ and BF |
5 (28) |
A—0 (0) |
B—1 (20) |
C—4 (80) |
Initial positive association which became negative after adjustment for confounders. |
2 (11) |
A—0 (0) |
B—1 (50) |
C—1 (50) |
Initial positive association weakened after adjustment for confounders but remained statistically significant |
2 (11) |
A—1 (50) |
B—0 (0) |
C—1 (50) |
Childhood 1–18 years of age n=70 |
No association between IQ and BF |
14 (20) |
A—3 (21) |
B—5 (36) |
C—6 (43) |
Positive association between IQ and BF |
26 (37) |
A—10 (38.5) |
B—6 (23) |
C—10 (38.5) |
Initial positive association which became negative after adjustment for confounders. |
16 (23) |
A—6 (37.5) |
B—6 (37.5) |
C—4 (25) |
Initial positive association weakened after adjustment for confounders but remained statistically significant |
14 (20) |
A—12 (86) |
B—2 (14) |
C—0 (0) |
Adulthood ≥18 years of age n=5 |
No association between IQ and BF |
2 (40) |
A—0 (0) |
B—1 (50) |
C—1 (50) |
Positive association between IQ and BF |
1 (20) |
A—0 (0) |
B—1 (100) |
C—0 (0) |
Initial positive association which became negative after adjustment for confounders. |
1 (20) |
A—0 (0) |
B—1 (100) |
C—0 (0) |
Initial positive association weakened after adjustment for confounders but remained statistically significant |
1 (20) |
A—1 (100) |
B—0 (0) |
C—0 (0) |