1Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.
2Department of Epidemiology, School of Public Health, Seoul National University, Seoul, Korea.
3Department of Cancer Registry, National Cancer Center of Korea, Goyang, Korea.
4Department of Occupational & Environmental Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea.
Copyright © 2011 The Korean Society for Preventive Medicine
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The authors have no conflicts of interest with the material presented in this paper.
This article is available at http://jpmph.org/.
Classification | No. of subjects completed surveys in 1995 | No. of subjects followed (follow-up rate %) | No. subjects with insufficient ID information | |||
---|---|---|---|---|---|---|
Exposed | A: 35.0 | A: 35.4 | A: 33.0 | |||
31 | M: 38.7 | 30 (96.7) | M: 40.0 | 1 | M: 0.0 | |
S: 29.0 | S: 26.6 | S: 0.0 | ||||
D: 0.0 | D: 0.0 | D: 0.0 | ||||
Control 1 | A: 32.81 | A: 33.71 | A: 26.21 | |||
642 | M: 46.8 | 489 (76.2) | M: 46.6 | 153 | M: 48.4 | |
S: 34.3 | S: 35.1 | S: 31.2 | ||||
D: 24.4 | D: 26.2 | D: 19.0 | ||||
Control 2 | A: 39.11 | A: 39.21 | A: 38.7 | |||
215 | M: 46.0 | 178 (82.7) | M: 49.7 | 37 | M: 21.71 | |
S: 34.4 | S: 36.7 | S: 15.71 | ||||
D: 22.7 | D: 24.0 | D: 11.11 | ||||
Total | A: 37.4 | A: 37.6 | A: 36.8 | |||
888 | M: 46.5 | 697 (78.5) | M: 46.9 | 191 | M: 44.5 | |
S: 34.2 | S: 35.1 | S: 29.3 | ||||
D: 24.2 | D: 26.2 | D: 18.6 |
A: mean age (years), M: men %, S: smoker %, D: drinker %.
Bold: significant difference between followed and not-followed subjects in each exposure group (p<0.05, by chi-square test, d.f.=1).
1 significantly different distribution compared with the similar stratum of other exposure status (p<0.05, by chi-square test d.f.=2).
Group (n) | Observed case | Person-year of observation | Expected No. of cases | SIR (95% CI) | SIR adjusted for f/u rate4 |
---|---|---|---|---|---|
Exposed (30) | All cancer2 1 | 374.8 | 1.36 | 0.73 (0.10 - 5.21) | 0.70 |
GI cancer3 0 | 380.9 | 0.46 | NA | ||
Control 11 (489) | All cancer 29 | 5932.5 | 24.5 | 1.18 (0.82 - 1.71) | 0.92 |
GI cancer 14 | 5984.1 | 8.62 | 1.62 (0.96 - 2.74) | ||
Control 21 (178) | All cancer 8 | 2191.3 | 6.29 | 1.27 (0.64 - 2.55) | 1.07 |
GI cancer 3 | 2192.9 | 2.06 | 1.46 (0.47 - 4.52) | ||
All subjects (697) | All cancer 38 | 8498.6 | 32.2 | 1.18 (0.86 - 1.62) | NA |
GI cancer 17 | 8558.0 | 11.2 | 1.53 (0.95 - 2.45) |
SIR: standardized incidence ratio of cancer occurrence, CI: confidence interval, f/u: follow up, NA: not available.
1 control 1: external control, control 2: internal control,
2 all cancer cases including ICD-10 code C00-C97,
3 all gastrointestinal cancer cases including ICD-10 code C15-C20,
4 adjusted SIR: SIR calculated assuming all the subjects were followed-up and no more cases were found (minimal SIR).
Classification | No. of subjects completed surveys in 1995 | No. of subjects followed (follow-up rate %) | No. subjects with insufficient ID information | |||
---|---|---|---|---|---|---|
Exposed | A: 35.0 | A: 35.4 | A: 33.0 | |||
31 | M: 38.7 | 30 (96.7) | M: 40.0 | 1 | M: 0.0 | |
S: 29.0 | S: 26.6 | S: 0.0 | ||||
D: 0.0 | D: 0.0 | D: 0.0 | ||||
Control 1 | A: 32.8 |
A: 33.7 |
A: 26.2 |
|||
642 | M: 46.8 | 489 (76.2) | M: 46.6 | 153 | M: 48.4 | |
S: 34.3 | S: 35.1 | S: 31.2 | ||||
D: 24.4 | D: 26.2 | D: 19.0 | ||||
Control 2 | A: 39.1 |
A: 39.2 |
A: 38.7 | |||
215 | M: 46.0 | 178 (82.7) | M: 49.7 | 37 | M: 21.7 |
|
S: 34.4 | S: 36.7 | S: 15.7 |
||||
D: 22.7 | D: 24.0 | D: 11.1 |
||||
Total | A: 37.4 | A: 37.6 | A: 36.8 | |||
888 | M: 46.5 | 697 (78.5) | M: 46.9 | 191 | M: 44.5 | |
S: 34.2 | S: 35.1 | S: 29.3 | ||||
D: 24.2 | D: 26.2 | D: 18.6 |
Group (n) | Observed case | Person-year of observation | Expected No. of cases | SIR (95% CI) | SIR adjusted for f/u rate |
---|---|---|---|---|---|
Exposed (30) | All cancer |
374.8 | 1.36 | 0.73 (0.10 - 5.21) | 0.70 |
GI cancer |
380.9 | 0.46 | NA | ||
Control 1 |
All cancer 29 | 5932.5 | 24.5 | 1.18 (0.82 - 1.71) | 0.92 |
GI cancer 14 | 5984.1 | 8.62 | 1.62 (0.96 - 2.74) | ||
Control 2 |
All cancer 8 | 2191.3 | 6.29 | 1.27 (0.64 - 2.55) | 1.07 |
GI cancer 3 | 2192.9 | 2.06 | 1.46 (0.47 - 4.52) | ||
All subjects (697) | All cancer 38 | 8498.6 | 32.2 | 1.18 (0.86 - 1.62) | NA |
GI cancer 17 | 8558.0 | 11.2 | 1.53 (0.95 - 2.45) |
Observed mortality from any cause | Person-year of observation | Expected No. of cases | SMR (95% CI) | |
---|---|---|---|---|
Exposed | 1 | 380.9 | 2.65 | 0.37 (0.05 - 2.67) |
Control 1 | 52 | 6060.4 | 11.58 | 1.29 (0.78 - 2.15) |
Control 2 | 15 | 2213.2 | 47.01 | 1.11 (0.84 - 1.45) |
All subjects | 68 | 8654.6 | 61.25 | 1.11 (0.87 - 1.40) |
A: mean age (years), M: men %, S: smoker %, D: drinker %. Bold: significant difference between followed and not-followed subjects in each exposure group (p<0.05, by chi-square test, d.f.=1). significantly different distribution compared with the similar stratum of other exposure status (p<0.05, by chi-square test d.f.=2).
SIR: standardized incidence ratio of cancer occurrence, CI: confidence interval, f/u: follow up, NA: not available. control 1: external control, control 2: internal control, all cancer cases including ICD-10 code C00-C97, all gastrointestinal cancer cases including ICD-10 code C15-C20, adjusted SIR: SIR calculated assuming all the subjects were followed-up and no more cases were found (minimal SIR).
SMR: standardized mortality ratio from all cause death, CI: confidence interval. Cause-specific mortality rate was not provided due to privacy protection regulation.