Rosell-Pradas Jorge, Sánchez-Cantalejo Emilio
Escuela Andaluza de Salud Pública, Granada, España.
Cir Esp. 2008 Sep;84(3):158-63. doi: 10.1016/s0009-739x(08)72158-4.
To describe the frequency and bibliographic characteristics of letters to the editor in the journal, Cirugía Española published between 2000 and 2007 and to compare the differences in the periods between 2000-2003 and 2004-2007.
A descriptive and cross-sectional study, using the letters to the editor published in Spanish surgery between 2000 and 2007, as observation units. The variables considered were: the number of letters according to the volume and year of publication, substantive content of the paper, text length, graphics resources use, number of signatories and their professional profile, institutions of the authors, by origin and number of Autonomous Communities and number of bibliographical references. To meet the second objective, we compared letters from the period 2000-2003 with the period 2004-2007 against the rest of variables considered as a result. We used descriptive statistics and statistical analysis for comparison of distributions (chi2), with a level of significance of p < 0.05, using the SPSS software (Version 15.0).
We identified 312 documents classified as letters. Between 2002 and 2005 their number was small. Often referring to clinical cases 187 (59.9%) and related letters, 98 (31.4%). Of those, 81.1% met the standard length of the text and only 6 letters (1.9%) was the use of graphics exceeded. In 122 letters (39.1%) the permitted number of authors was exceeded. They were mostly contributed by surgeons, 238 cases (76.3%), usually a single hospital, with 294 letters (94.2%) mainly from, Catalonia, Andalusia, Madrid and Valencia. Only 58.1% of the letters complied with the permitted number of references. More related letters were published in the last period (59 letters; 42.1%) than during the years 2000-2003 (39 letters; 22.7%) (chi2 = 14.79; p < 0.001). The correct length of the text improved in the second period, 136 (97.1%), compared to the first 117 (68%) (chi2 = 42.67; p < 0.001. The graphics resources were used properly in both periods. The number of signatories ranged between 1 and 5 in 51.2% of cases in the first period compared to 72.9% in the second (chi2 = 15.25; p < 0.001. In both periods analysed the professional profile of the signatories was similar. More than one institution was involved in 10% of the letters in the final period, compared to 2.3% in the first year period (chi2 = 8.36; p = 0.004). The adequacy of the number of permitted references was higher in the final period (87.1%) than in the initial (34.9%) (chi2 = 86.72; p < 0.001).
The letters in Cirugía Española journal have regained their previous frequency after a period of stagnation between 2002 and 2005. In the final period of the study there was a marked improvement compared to the first one in most indicators studied.
描述2000年至2007年发表在《西班牙外科学》杂志上的读者来信的频率和文献特征，并比较2000 - 2003年和2004 - 2007年这两个时期的差异。
采用描述性横断面研究，将2000年至2007年发表在西班牙外科学领域的读者来信作为观察单位。所考虑的变量包括：根据出版卷期和年份划分的来信数量、论文的实质内容、文本长度、图形资源使用情况、签名者数量及其专业背景、作者所在机构、按自治区来源和数量以及参考文献数量。为实现第二个目标，我们将2000 - 2003年期间的信件与2004 - 2007年期间的信件在其余作为结果考虑的变量方面进行比较。我们使用描述性统计和分布比较的统计分析（卡方检验），显著性水平为p < 0.05，使用SPSS软件（版本15.0）。
我们确定了312篇被归类为读者来信的文献。2002年至2005年期间数量较少。经常提及临床病例的有187篇（59.9%）以及相关信件98篇（31.4%）。其中，81.1%符合文本标准长度，仅有6篇信件（1.9%）图形使用超量。122篇信件（39.1%）作者数量超出允许范围。大多来信由外科医生撰写，共238例（76.3%），通常来自单一医院，294篇信件（94.2%）主要来自加泰罗尼亚、安达卢西亚、马德里和巴伦西亚。仅有58.1%的信件参考文献数量符合要求。最后一个时期发表的相关信件（59篇；42.1%）多于2000 - 2003年（39篇；22.7%）（卡方 = 14.79；p < 0.001）。与第一个时期的117篇（68%）相比，第二个时期文本长度符合要求的比例有所提高，为136篇（97.1%）（卡方 = 42.67；p < 0.001）。两个时期图形资源使用均恰当。第一个时期51.2%的案例签名者数量在1至5人之间，而第二个时期为72.9%（卡方 = 15.25；p < 0.001）。在两个分析时期，签名者的专业背景相似。最后一个时期10%的信件涉及多个机构，而第一年时期为2.3%（卡方 = 8.36；p = 0.004）。最后一个时期参考文献数量符合要求的比例（87.1%）高于初始时期（34.9%）（卡方 = 86.72；p < 0.001）。
在经历了2002年至2005年的停滞期后，《西班牙外科学》杂志的读者来信恢复了之前的频率。在研究的最后一个时期，与第一个时期相比，大多数研究指标有显著改善。
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