Table 3: Basic information on number, sizes, and size distributions of OB associations in galaxies, as found in the literature.

	Number	Average	Peak	Associations
	of	diameter	location	with
Galaxy	associations	(pc)	(pc)	D>200 pc
NGC 7793	148	207	130	55
NGC 300	117	195	130	37
M 31	174	118	110	13
M 33	41	40	50	2
IC 1613	60	63	50	0
LMC	121	78	50	6
SMC	31	90	50	1
NGC 6822	13	90	50	0
M 101	97	99	50	5
NGC 925	110	115	50	9
NGC 2090	70	104	90	1
NGC 2541	84	108	50	12
NGC 3351	73	87	70	3
NGC 3621	44	89	50	2
NGC 4548	82	125	90	10
NGC 1058	69	104	50	7
NGC 7217	149	129	70	21
UGC 12732	108	178	110	30
NGC 3377A	83	87	50	8
NGC 3507	90	121	90	16
NGC 4394	185	114	90	25