Table 1. Descriptive Statistics for Each Measure about Adherence Research in 2000–2011.

	Total papers	Paper with keywords	Total keywords	Total frequency of keywords	Keywords with high frequency	Total frequency of keywords with high frequency	Centrality of keywords			Network Centralization
							Mean±SD	Min	Max
2000–2005	831	788	1591	5268	45(2.83%)	2067(39.42%)	1.499±3.403	0.000	22.598	21.58%
2006–2011	1566	1520	2740	11709	95(3.47)	6060(51.76)	0.739±1.793	0.000	16.257	15.68%
Total	2397	2308	3519	16986	131(3.72%)	9532(56.12%)	-	-	-	-