In Spain, provision of health care services is decentralized, and thus the responsibility of several
autonomous communities. In 1998, an analysis of the effects of greater autonomy on legislative performance and policy outcomes for health care observed a positive effect on the former, but no effect on the latter. The analysis noted that a possible explanation for this disconnect was that autonomous communities had only experienced greater autonomy in the area of health care for a short time, and positive effects on policy outcomes could take longer to manifest. In 2009, an analysis of data collected by the Spanish National Health Survey in 2001 showed that autonomous communities with decentralized health services tended to have better equity performance. In 2014, an analysis of data collected by the Spanish
Centre of Sociological Research between 1996 and 2009 found that for twenty variables of public satisfaction with health care services, decentralization not only had no effect on 2 measures of primary or specialized care and 1 of hospital care, but actually performed worse on 3 measures of primary or specialized care and 1 measure of hospital care. No statistically significant trend was observed for twelve of the twenty measures of satisfaction. The authors of the analysis stressed that the data was limited due to the subjective nature of patient reports, and the possible inability of some to properly evaluate performance of health care services. ==International comparisons==