Table 2.
Intercorrelations among Model Variables
| Model variables | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Infant iron status (IS-ID-IDA)a | – | ||||||||||||
| 2. Iron deficient only (ID)b- infancy | – | – | |||||||||||
| 3. Iron-deficient anemic (IDA)c-infancy | – | – | – | ||||||||||
| 4. ID v IDAd - infancy | – | – | – | – | |||||||||
| 5. Child dull affect - 5 yrs | .07* | .01 | .06 | .07 | – | ||||||||
| 6. Child timidity – 5 yrs | .07* | .04 | .07 | .05 | .40*** | – | |||||||
| 7. Mother unresponsiveness −5 yrs | .07* | .01 | .07 | .09 | .18*** | .07* | – | ||||||
| 8. Mother low warmth/affection-5 yrs | .08* | .02 | .10* | .13** | .12*** | .05 | .32*** | – | |||||
| 9. Mother lows stimulation – 5 yrs | .00 | .03 | .02 | .04 | .19*** | .12** | .50*** | .33*** | – | ||||
| 10. Peer rejection – 10 yrs | .03 | .01 | .04 | .09 | .16*** | .04 | .17*** | .27*** | .20*** | – | |||
| 11. Deviant friends – adolescence | .09* | .07* | .05 | .02 | .06 | .02 | .07 | .06 | .07 | .14*** | – | ||
| 12. Friends uncommitted school –adolescence | .08* | .04 | .06 | .04 | .04 | −.05 | .09* | .04 | .08* | .05 | .32*** | – | |
| 13. Substance use - adolescence | .05 | .00 | −.06 | .02 | −.07 | −12** | .01 | .10** | .06 | .12** | .23*** | .26*** | – |
| 14. Delinquent behaviors - adolescence | .06 | .07* | .02 | .06 | .01 | −.07 | .02 | .09* | .02 | .22*** | .48*** | .33*** | .41*** |
a
Note. Coded as a continuous variable, reflecting increasing severity: 0 = iron sufficient (IS), 1 = iron deficient (ID), 2 = iron-deficient anemic (IDA). N = 873.
b
0 = iron sufficient, 1 = iron deficient; N = 731.
c
0 = iron sufficient, 1 = iron-deficient anemic; N = 625.
d
0 = iron deficient only, 1 = iron-deficient anemic; N = 390.
*
p < .05.
**
p < .01.
***
p < .001.