 HTLV1 antibody  Negative  Positive  Total  P value  No (%)  No (%)  No (%) 
 Maternal age      <21 years old  68 (17.0%)  0 (0.00%)  68 (16.7%)   21–30 years old  248 (61.8%)  6 (100.0%)  254 (62.4%)  0.783  >30 years old  85 (21.2%)  0 (.0%)  85 (20.9%)  
 Total  401 (100.0%)  6 (100.0%)  407 (100.0%)  
 Gestational age      Before term  23 (5.8%)  0 (.0%)  23 (5.8%)   Term  347 (86.5%)  6 (100.0%)  353 (86.7%)  0.271  After term  31 (7.7%)  0 (0%)  31 (7.6%)  
 Total  401 (100.0%)  6 (100.0%)  407 (100.0%)  

