求翻译：结果 随访6～12个月，治愈27例，好转18例，无效7例，治愈率、总有效率分别为51.9%和83.3%，无一例严重并发症发生；是什么意思？

The results were followed up 6 to 12 months, cured 27 cases, 18 cases improved, 7 cases, cure rate, the total effective rates were 51.9% and 83.3%, with no serious complications occurred;

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The result makes a follow-up visit for 6~12 months, cures 27 examples, changes for the better 18 examples, the invalid 7 examples, the cure rate, the total effectiveness respectively are 51.9% and 83.3%, does not have an example serious complication occurrence;

Result 6-12 months of follow-up, cure 27 cases, improvement in 18 cases, is not valid in 7 cases, cure rate, total effective rate and 51.9%, respectively, with no cases of severe complications;

Result 6-12 months of follow-up, cure 27 cases, improvement in 18 cases, is not valid in 7 cases, cure rate, total effective rate and 51.9%, respectively, with no cases of severe complications;