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Table 2 Characteristics of participants with testosterone data, who did or did not complete the Autism-Spectrum Quotient (AQ)

From: Perinatal testosterone exposure and autistic-like traits in the general population: a longitudinal pregnancy-cohort study

  Completed AQ (n = 374) Did not complete AQ (n = 332)  
Categorical variables N n (%) N n (%) P value
Maternal age at birth 366   320   <.01
<20   19 (5.2)   32 (10.0)  
20-24   65 (17.8)   73 (22.8)  
25-29   91 (24.9)   107 (33.4)  
30-34   120 (32.8)   76 (23.8)  
35+   71 (19.4)   32 (10.0)  
Maternal education at pregnancy 366   320   .01
Completed secondary school   156 (42.6)   104 (32.5)  
Did not complete secondary school   210 (57.4)   216 (67.5)  
Family income below poverty line 364   318   <.01
Yes   115 (31.6)   149 (46.9)  
No   249 (68.4)   169 (53.1)  
Maternal smoking in pregnancy 366   320   .01
None   293 (80.1)   223 (69.7)  
1 to 10 cigarettes daily   42 (11.5)   56 (17.5)  
11+ cigarettes daily   31 (8.5)   41 (12.8)  
Maternal alcohol intake during pregnancy 366   320   .01
None   199 (54.4)   212 (66.3)  
Once a week or less   143 (39.1)   88 (27.5)  
Several times a week or more   24 (6.6)   20 (6.3)  
Gestational age 366   320   .36
< 32 weeks   3 (0.8)   7 (2.2)  
32 to 37 weeks   64 (17.5)   48 (15.0)  
38 to 40 weeks   231 (63.1)   210 (65.6)  
> 40 weeks   68 (18.6)   55 (17.2)  
Proportion of optimal birthweight 372   332   .41
<90   117 (31.5)   96 (28.9)  
90 to 110   208 (55.9)   183 (55.1)  
>110   47 (12.6)   53 (16.0)  
Sex 374   332   .14
Male   190 (50.8)   181 (54.5)  
Female   184 (49.2)   151 (45.5)  
Apgar scores 366   319   .94
Generally normal   353 (96.4)   308 (96.6)  
Fairly low   13 (3.6)   11 (3.4)  
Critically Low   0 (0)   0 (0)  
Parity 374   332   .51
1   167 (44.7)   159 (47.9)  
2   121 (32.4)   95 (28.6)  
>2   86 (23.0)   78 (23.5)