Table 2.

Predictors of serum phosphate (mmol/L) at baseline in multivariable linear regression

		β coefficient	95 % confidence interval	Standardised β coefficient	P value
Sex, male		−0.35	(−0.53 - -0.17)	−0.077	<0.001
Age, per year		−0.003	(−0.003 - -0.002)	−0.207	<0.001
eGFR, per ml/min/1.73 m2		−0.001	(−0.002 - -0.001)	−0.177	<0.001
SIMD quintiles	I	Ref.
	II–III	−0.011	(−0.003 - 0.010)	−0.021	0.31
	IV–V	−0.029	(−0.049 - -0.009)	−0.058	0.005
Diastolic blood pressure, per mm Hg		-0.001	(-0.002 - 0.000)	-0.047	0.053
Body weight, per kg		−0.001	(−0.002 - -0.001)	−0.111	<0.001
Urinary PCR, per 10 mg/mmol		0.00078	(0.00050 - 0.00107)	0.113	<0.001
Haemoglobin, per g/L		−0.002	(−0.003 - -0.001)	−0.174	<0.001
Potassium, per mmol/L		0.073	(0.057 - 0.090)	0.173	<0.001
Adjusted R2	0.172

eGFR Estimated glomerular filtration rate, SIMD Scottish index of multiple deprivation. Quintile I comprise the most deprived. PCR Protein-creatinine ratio. Also adjusted for systolic blood pressure, albumin adjusted serum calcium, serum albumin, presence/absence of diabetes and/or coronary heart disease