Mental component score (MCS) norms by quartiles

Age (years)	Mean (SD)	<25th	25th	50th	75th
25–34	48.34 (10.12)	≤41.89	41.90	51.31	55.22
35–44	48.84 (9.49)	≤43.22	43.23	51.16	55.75
45–54	50.07 (10.18)	≤45.54	45.55	53.48	56.99
55–64	50.56 (10.16)	≤44.60	44.61	53.71	57.94
≥65	51.44 (10.54)	≤43.42	43.43	55.08	58.96