Table 1.

Included studies in the meta-analysis of calcium balance from a change of phosphate intake

Study	Year	Subjects	Age range (years)	% female	Study design	Baseline PO4 intake (mmol/day)	Ethics approval	Food weighted	Food lab analysis	Usual Calcium intake
Patton [21]	1953	young women	N/A	(100%)	RCO	25	N/A	yes	yes	no
Malm [27]	1953	male prisoners	20-56	0	CO	unclear	N/A	yes	yes	yes
Goldsmith [28]	1976	postmenopausal women with osteoporosis	63-75	7(100%)	CO	40	N/A	no	no	yes
Bell [29]	1977	young adults	24-36	3/8 (38%)	CO	32	yes	yes	yes	no
Spencer [30]	1978	adult men	38-65	0	CO	25	N/A	yes	yes	no
Hegsted [31]	1981	adult males	19-25	0	CO	33	yes	yes	yes	no
Zemel [32]	1981	young men	18-24	0	CO	27	yes	yes	yes	no
Schuette [33]	1982	young men	19-26	0	CO	29	yes	yes	yes	no
Spencer [34]	1986	adult males	48-71	0	CO	26	yes	yes	yes	no
Whybro [36]	1998	healthy men	19-38	0	RCO	26 & 32	yes	no	no	no
Kemi [37]	2006	young women	20-28	48(100%)	RCO	16	yes	no	no	no
Krapf [35]	1995	young men	22	0	CO	49	yes	no	no	no