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. 2015 Mar 6;5:8813. doi: 10.1038/srep08813

Table 1. Comparison of mean age and gender.

Group (n) BP-II (531) Controls (447) Statistics P
Age (Mean ± SD) 31.9 ± 11.5 35.4 ± 9.7 t = 5.03 <0.001***
Gender (Male/Female) 255/276 328/119 χ2 = 64.8 <0.001***

BP-II: bipolar II disorder; SD, standard deviation.

***P < 0.001.