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Table 2:

OB Stars in the 3 OB categories and corresponding statistics.
Ni: OBMS (%) OBe (%) OBSG (%) Ecl. (%) $N_{\rm tot}$ (%)
ampl. $\ge$ $T_{\rm h}$ 256 ($34\pm4.5$) 172 ($23\pm4$) 201 ($27\pm4$) 122 ($17\pm3.5$) 751 ($31\pm2.5$)
$T_{\rm l}$ $\le$ ampl. < $T_{\rm h}$ 442 ($68\pm5$) 32 ($5\pm2$) 177 ($27\pm4.5$)   651 ($27\pm2$)
ampl. < $T_{\rm l}$ 782 ($78\pm3$) 25 ($2\pm1$) 198 ($20\pm3$) (1) 1005 ($42\pm2.5$)
Total category 1480 ($61\pm2.5$) 229 ($10\pm 1.5$) 576 ($24\pm2$)   2407
Not included 2 0 1 (4) 7
Total category 1482 ($61\pm2.5$) 229 ($10\pm 1.5$) 577 ($25\pm2$)   2414
Statistics (%)          
OBi,v vs. tot. OBi $17\pm2.5$ $75\pm7$ $ 35\pm5$    
OBi,b vs. tot. OBi $83\pm2.5$ $25\pm7$ $65\pm5$    
OBi,pv vs. tot. OBi $30\pm3$ $14\pm6$ $31\pm5$    
OBi,nv vs. tot. OBi $53\pm3$ $11\pm5$ $33\pm5$    
OBi,v vs. OBv $46\pm4.5$ $24\pm4$ $30\pm4$   751
OBi,b vs. OBb $74\pm3$ $3\pm1$ $23\pm2.5$   1656

OBi corresponds to the 3 intrinsic categories, i being OBMS, OBe or OBSG. The index v stands for ``variable'' (above $T_{\rm h}$), b means below $T_{\rm h}$, nv stands for ``non-variable'' and pv stands for ``possibly variable''. In the cases ``A vs. B'', $B={\rm OB}_{i}$ corresponds to $N_{\rm tot} = 1480$, 229 or 576; while A corresponds to Ni.

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