Table 2.
Prenatal exposure to maternal cigarette smoking (PEMCS) and demographic characteristics, cognitive score and potential mediating factors
| No PEMCS | PEMCS | T/Chi-square/Z | P-value | |
|---|---|---|---|---|
| Demographic factors | ||||
| Male sex | 98/253 (39%) | 95/218 (44%) | 1.136 | 0.287 |
| Smoking at 26-27 years | 80/253 (32%) | 97/218 (45%) | 8.275 | 0.004 |
| Prenatal exposure to alcohol | 19/249 (8%) | 54/217 (25%) | 26.129 | <0.001 |
| Birth weight (kg) | 3.643 | 3.497 | 3.404 | <0.001 |
| Cognitive z-scores | ||||
| Vocabulary | 0.079 | -0.091 | 1.842 | 0.066 |
| Matrix reasoning | 0.054 | -0.063 | 1.273 | 0.204 |
| Verbal fluency | 0.027 | -0.031 | 0.628 | 0.530 |
| Pegboard | 0.036 | -0.042 | 0.846 | 0.398 |
| Stroop | 0.011 | -0.013 | 0.251 | 0.802 |
| PAL | 0.039 | -0.052 | 0.979 | 0.328 |
| MSST | -0.049 | 0.052 | 1.036 | 0.301 |
| Adolescent mental health status | ||||
| Inattention and hyperactivity (SWAN) z-score | 0.170 | -0.203 | 3.720 | <0.001 |
| PLEs | 69/229 (30%) | 74/191 (39%) | 3.440 | 0.064 |
| Externalizing (YSR) z-score | -0.185 | 0.208 | 4.072 | <0.001 |
PAL Paired Associates Learning, MSST Modified Stop Signal Test, SWAN Strengths and Weaknesses of ADHD symptoms and Normal behavior, PLEs Psychotic-like Experiences, YSR Youth Self-Report
Bold = P < 0.05