Aleksandra Ciałkowska-Rysz, Mariusz Kowalczyk, Leszek Gottwald, Sylwia Kaźmierczak-Łukaszewicz 100 s 80 t n e ita60 p f o re40 b m u N20 ] [%25 20 15 10 5 0 0 <20 20- 50- 55- 60- 65- 70- 75- 80- 85- > 89 49 54 59 64 69 74 79 84 89 Patients age [years] Figure 1. Age structure of study population 50 45 40 35 30 29.5 45 47 11.3 38.3 36 20.3 16.6 27.5 6.8 # # ¤ ¤ v Lack of Ischemic Arterial Diabetes Chronic Central comor- heart hyper- pulmonary nerves bidities disease tension disease diseases Studied population General population Figure 2. The incidence of common comorbidities in studied population and general Polish population #Data available from the Central Statistical Office in Poland in 2009, ¤ data available from the WOBASZ study, vcombined data from the PMSEAD study and BOLD study 11.2 a t a d o N Statistical analysis All data were analysed using CSS Statistica 8.0 software (StatSoft Inc., Tulsa, OK., USA). The stan- dard χ2 test, as a statistical method, was used to estimate the significance of the association between the age of patients and the presence of the above-mentioned comorbidities, separately. The Wilcoxon rank-sum test was used for testing dif- ferences in number of concomitant diseases between two compared groups and the Kruskal- Wallis test was used for testing more than two sub- groups of ICD-10 diagnoses. Spearman’s rank cor- relation was used to test correlation of patients’ age and the number of concomitant diseases. A p-value less than 0.05 was considered as significant. Results The study group consisted of 259 women (47.7%) and 284 men (52.3%). The patients’ age ranged from 25 to 91 years (median age 69.2 ±11.4 years; Figure 1). The most common primary neo- plasm locations in the study group for men were lung (28.2% vs. 21.4% in general population) and colorectal cancer (18.7% vs. 11.4% in general popu- lation), and in women breast (19.7% vs. 22.8% in general population) and colorectal cancer (17.4% vs. 9.2% in general population) (Table II). In the study group only 160 patients did not have concomitant disorders (29.5% vs. 45% in general population; Figure 2). However, if the concomitant diseases were present their mean number was 1.6 for women and 1.8 for men vs. 1.7 for women and 1.2 for men in the general Polish population respec- tively (Table III). Apart from hypertension and cen- tral nervous system diseases, the incidence of ischemic heart disease, diabetes, and chronic pul- monary diseases was significantly different in com- parison to the general populations (47.0% vs. 11.3%; 20.3% vs. 6.8%; 16.6% vs. 27.5%, respectively; Fig- ure 2). There were no statistically significant dif- Table II. Oncological diagnoses in studied population and general Polish population in 2009 Primary neoplasm location C02-C16 (upper GI tract) C18-C20 (colorectal) C22-C25 (liver, biliary, pancreatic) C34 (lung) C50 (breast) C61 (prostate) C64-C67 (urinary) Other Total C53-C56 (female sex organs) Total Studied population N % Studied population N % Males General population % Females Studied population N % General population % 48 98 51 111 51 35 34 40 75 543 8.8 18.0 9.4 20.4 9.4 6.4 6.3 7.4 13.8 100 30 53 14 80 – – 34 28 45 284 10.6 18.7 4.9 28.2 – – 12.0 9.9 15.8 100 5# 11.4 2.4® 21.4 * – 13.3 10.8^ 35.7 100 18 45 37 31 51 35 – 12 30 259 6.9 17.4 14.3 12.0 19.7 13.5 – 4.6 11.6 100 2.5# 9.2 * 8.5 22.8 16.8 – 2.7¤ 37.5 100 #Included only stomach cancer, *included in the other group, ®included only pancreatic cancer, ^included only urinary blad- der and kidney cancer, ¤included only kidney cancer 498 Arch Med Sci 3, June / 2012