The presence of contact details according to recruitment status for trials registered in 2012.

Legend Table 3: Percentages of records for which different aspects of contact details were present for recruiting and not-recruiting trials.1 Numbers of records for subcategories do not add up to 386 because for three trials no primary sponsor was registered.表3图例：招募中与未招募临床试验的联系方式各维度信息完备的记录占比。[1] 各子类别记录数未总计为386，原因是有3项临床试验未登记主要申办方（primary sponsor）。