Table 2

Characteristics of the study cohort and sample
Cohort* (n = 749) Sample* (n = 216) P
Age (year) 60.13 (7.32) 7.32 (60.23) 0.86
Age group 50-59 years 426 (56.88) 121 (56.02)
≥ 60 years 323 (43.12) 95 (43.98) 0.88
Gender Male 401 (53.54) 123 (56.94)
Female 348 (46.46) 93 (43.06) 0.39
Risk profile Moderate 211 (28.17) 59 (27.31)
High 538 (71.83) 157 (72.69) 0.86
Follow-up (year) 3.34 (1.28) 3.55 (1.22) 0.03
Outcome EGC 6 (0.8) 1 (0.46)
Death 7 (0.93) 2 (0.93)
Drop-out 49 (6.54) 8 (3.70)
Survival 687 (91.73) 205 (94.91) 0.47
Incidence Rate 240 (108, 534) 131 (18, 930) 0.98 §
Death Rate 280 (133, 587) 262 (66, 1048) 0.978 §
Drop-out Rate 1959 (1481, 2592) 1049 (524, 2097) 0.831 §

Abbreviation: EGC: early gastric cancer.

* Values are the mean (SD) for continuous variables and n (%) for categorical variables. Rates are reported with 95% confidence interval.

Student t-test.

Chi-Square test.

§ Fisher’s exact test based on rate difference.

Unit of rates is 1/100,000 per year.

Zhou et al.

Zhou et al. BMC Health Services Research 2013 13:139   doi:10.1186/1472-6963-13-139

Open Data