Table 3

Urinary sodium excretion of Shandong adults aged 18–69 years in 2011 (Weighted mean, SD, 95% CI mmol/24 h)

Gender	Age group	Urban					Rural					Total
Gender	Age group	N	Mean	SD	95% CI		N	Mean	SD	95% CI		N	Mean	SD	95% CI
Male	18–29	85	241.64	18.23	194.77	288.51	196	244.81	9.85	222.52	267.10	281	243.88	8.72	225.17	262.58
	30–39	91	255.88	12.30	224.25	287.50	185	247.19	9.72	225.21	269.17	276	249.99	7.79	233.30	266.69
	40–49	65	233.33	17.89	187.35	279.31	139	247.90	7.48	230.99	264.82	204	243.59	7.40	227.72	259.47
	50–59	51	263.00	12.72	230.28	295.71	111	251.36	12.64	222.78	279.95	162	255.27	9.44	235.02	275.52
	60–69	50	239.00	14.74	201.12	276.88	103	232.24	12.62	203.69	260.79	153	234.42	9.82	213.36	255.49
	Subtotal	342	246.81	12.46	214.77	278.85	734	245.96	8.22	227.38	264.55	1076	246.23	6.87	231.49	260.96
Female	18–29	79	200.77	13.37	166.40	235.14	173	225.93	7.26	209.51	242.35	252	219.01	6.69	204.66	233.37
	30–39	79	236.43	8.99	213.31	259.54	165	234.70	9.62	212.94	256.46	244	235.27	7.11	220.01	250.53
	40–49	59	236.92	12.94	203.65	270.18	131	231.88	12.22	204.25	259.52	190	233.46	9.43	213.24	253.69
	50–59	53	213.23	10.24	186.91	239.54	111	245.28	11.41	219.48	271.09	164	234.73	8.73	216.01	253.45
	60–69	41	200.29	11.23	171.42	229.15	94	221.79	7.72	204.32	239.26	135	215.48	6.34	201.88	229.07
	Subtotal	311	219.97	9.07	196.66	243.29	674	232.32	7.72	214.85	249.79	985	228.52	5.99	215.67	241.37
Total	18–29	164	222.94	10.65	195.56	250.32	369	235.72	7.63	218.46	252.98	533	232.08	6.15	218.89	245.26
	30–39	170	246.19	9.86	220.85	271.54	350	241.06	9.11	220.44	261.68	520	242.73	6.98	227.75	257.71
	40–49	124	235.11	12.06	204.10	266.11	270	240.30	8.95	220.05	260.56	394	238.72	7.16	223.37	254.07
	50–59	104	238.44	7.54	219.05	257.83	222	248.32	9.26	227.36	269.27	326	245.03	6.68	230.70	259.37
	60–69	91	220.68	12.40	188.80	252.56	197	226.94	8.61	207.45	246.43	288	225.01	7.05	209.89	240.14
	Subtotal	653	233.82	9.90	208.36	259.28	1408	239.30	7.52	222.28	256.33	2061	237.61	5.98	224.77	250.44