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. 2019 May 30;31:e6. doi: 10.35371/aoem.2019.31.e6

Table 3. Differences in blood mercury concentration according to hypertension existence.

Hg concentration (µg/L)	All subjects				PSM subjects
	Hypertension		χ²	p-value	Hypertension		χ²	p-value
	Yes	No	χ²	p-value	Yes	No	χ²	p-value
> 5.8	2,394 (53.9)	2,044 (46.1)	4.873	0.027	1,486 (52.5)	1,344 (47.5)	12.155	0.001
≤ 5.8	991 (57.1)	746 (42.9)	4.873	0.027	823 (58.2)	592 (41.8)	12.155	0.001
> 15	3,263 (53.9)	2,703 (45.3)	2.552	0.110	214 (51.2)	204 (48.8)	4.639	0.031
≤ 15	126 (60.3)	83 (39.7)	2.552	0.110	126 (60.3)	83 (39.7)	4.639	0.031

Values are presented as number (%).

PSM: propensity score matching.