Table 4.

Multivariable adjusted relations of serum Mg and HP in patients with OA (n=962)

	Quintiles of serum Mg					P for trend
	Q1 (lowest)	Q2	Q3	Q4	Q5 (highest)
Median Mg concentration (mmol/L)	0.82	0.87	0.91	0.94	0.99	–
Participants (n)	200	215	190	168	189	–
HP (%)	40.0	33.5	37.4	42.3	40.2	–
Model 1*	1.00 (reference)	0.71 (0.47 to 1.06)	0.83 (0.54 to 1.25)	1.00 (0.66 to 1.54)	0.89 (0.59 to 1.35)	0.929
P values	–	0.095	0.368	0.987	0.582	–
Model 2*	1.00 (reference)	0.77 (0.50 to 1.19)	0.89 (0.57 to 1.39)	1.10 (0.70 to 1.74)	1.08 (0.69 to 1.68)	0.377
P values	–	0.245	0.608	0.686	0.744	–
Model 3*	1.00 (reference)	0.77 (0.50 to 1.19)	0.88 (0.56 to 1.38)	1.09 (0.68 to 1.72)	1.05 (0.67 to 1.65)	0.434
P values	–	0.235	0.574	0.727	0.818	–

Data are adjusted OR (95% CI), unless otherwise indicated.

*Model 1 was adjusted for age (continuous data) and gender (male, female); model 2 was adjusted for age (continuous data), Body Mass Index (continuous data), gender (male, female), educational level (high school or above, lower than high school), smoking status (yes, no), activity level (continuous data), alcohol drinking status (yes, no), diabetes (yes, no) and dyslipidemia (yes, no); model 3 was adjusted based on model 2, with additional factor of estimated glomerular filtration rate (continuous data).

HP, hypertension; Mg, magnesium; n, number; OA, osteoarthritis.