Table 2. Associations between telomere length and incident of autism.
| Telomere length | Cases, n (%) | Controls, n (%) | Adjusted OR (95% CL)* | P value |
|---|---|---|---|---|
| By median | ||||
| Long | 36 (32.7) | 65 (50.4) | 1.00 (reference) | - |
| Short | 74 (67.3) | 64 (49.6) | 2.15 (1.25–3.71) | 0.006 |
| By tertile | ||||
| First | 21 (19.1) | 43 (33.3) | 1.00 (reference) | - |
| Second | 35 (31.8) | 43 (33.3) | 1.66 (0.82–3.36) | 0.16 |
| Third | 54 (49.1) | 43 (33.3) | 2.59 (1.31–5.14) | 0.006 |
| P for trend** | 1.61(1.15–2.25) | 0.006 |
Abbreviations: OR, odds ratio; CI, confidence interval.
*Adjusted by age and gender. ** P value was calculated using relative telomere length as continuous variable.