Stata se 10

We performed a cross sectional cohort study using the registry of Hospital Israelita Albert Einstein as our database. This is a private hospital located in the city of São Paulo (SP), Brazil. Patients aged 65 or older who were diagnosed with solid tumors, and registered between January 2007 and December 2011, were the subjects of this analysis.
The charts and electronic institutional databases were reviewed to obtain information about sex, age at diagnosis, type of cancer, stage at diagnosis, and overall survival. We were not able to establish cancer-specific and all-cause mortality for a large proportion of patients.
Overall survival was defined as duration of time from diagnosis until death and patients were censored if they were lost to follow-up (collected until March 21, 2013). Overall survival was estimated using Kaplan-Meier methods. The impact of each treatment on survival was calculated using a Cox regression model.
TNM Classification of Malignant Tumors, seventh edition, was used to describe and categorize all different cancer stages in this article.
This project was approved by the Institutional Ethics Committee, CAAE: 19159813.3.0000.0071. All analyses were performed on Stata SE 10.1 (StataCorp. College Station, Texas, United States) with a two-sided alpha-value of 0.05, unless otherwise stated.

The results were expressed as mean ± standard error of mean (SEM). Fisher’s exact test and the χ² test were used to detect significant differences in categorical variables. Testing for differences in mean proportions was performed when appropriate with z tests. The non-parametric Wilcoxon’s rank sum test was used to detect significant differences in the median values of continuous variables. A two-tailed P value of 0.05 or less was considered to be statistically significant. The data were analyzed using the STATA SE 10.1 program (STATA Corp, College Station, TX, USA). Data for each kit were analyzed as recommended by the manufacturer. The cytokine concentration in each analyte was obtained by interpolating the fluorescence intensity of at least a 7-point dilution standard curve supplied with the kit and calculated by SoftMax® Pro Data Acquisition & Analysis Software and BD FCAP™ Array Software.

Results are presented as the mean ± SD. Data were analyzed using GraphPad Prism 6 software for Windows (GraphPad Software, Inc, La Jolla, CA, USA). Statistical analyses were performed using Stata/SE 10.1 software (Statacorp, College Station, Texas, USA). A two‐tailed Student's t test was used to compare data between two groups, and one‐way ANOVA was used to compare data between three groups with the Scheff multiple‐comparison test. For miRNA microarray assay, fold changes of 2 or more and a P‐value < 0.05 were considered statistically significant. For all other tests, P < 0.05 was considered statistically significant.

All data are expressed as percentages of the total number of respondents for the particular questions, unless otherwise specified. Data are presented as means (±SD) or medians (interquartile range (IQR)) depending on data distributions, unless stated otherwise. For assessing differences between physicians and nurses, ICU personnel were grouped according to their respective profession and data were analyzed using Fisher's exact tests. ICU physicians, fellows, and residents were classified as physicians; ICU nurses and ICU nurses in training were classified as nurses.
Statistical analyses were conducted using STATA/SE 10.1 (StataCorp LP, College Station, TX, USA).