Table 4. Sensitivity analysis for composite lifestyle score and gastric adenocarcinoma risk by length of follow-up, the Singapore Chinese Health Study, 1993–2014.
| Follow-up time | Cases | Person-years | HR (95% CI)a |
|---|---|---|---|
|
Follow-up ⩽5 years | |||
| Composite score (five factors) | |||
| 0/1/2 | 36 | 30 149 | 1.00 (reference) |
| 3 | 68 | 97 487 | 0.71 (0.47–1.07) |
| 4 | 51 | 121 335 | 0.44 (0.28–0.68) |
| 5 | 15 | 50 499 | 0.33 (0.18–0.61) |
| Ptrend | <0.001 | ||
| Composite Z-score (five factors) | |||
| 1st Quartile | 66 | 74 552 | 1.00 (reference) |
| 2nd Quartile | 40 | 74 837 | 0.60 (0.41–0.89) |
| 3rd Quartile | 29 | 75 022 | 0.43 (0.28–0.66) |
| 4th Quartile | 35 | 75 058 | 0.50 (0.33–0.76) |
| Ptrend | <0.001 | ||
|
Follow-up >5 years | |||
| Composite score (five factors) | |||
| 0/1/2 | 86 | 67 563 | 1.00 (reference) |
| 3 | 178 | 236 648 | 0.71 (0.55–0.92) |
| 4 | 187 | 305 805 | 0.57 (0.43–0.74) |
| 5 | 70 | 129 575 | 0.52 (0.38–0.73) |
| Ptrend | <0.001 | ||
| Composite Z-score (five factors) | |||
| 1st Quartile | 146 | 176 476 | 1.00 (reference) |
| 2nd Quartile | 127 | 183 910 | 0.83 (0.66–1.06) |
| 3rd Quartile | 133 | 188 382 | 0.84 (0.66–1.07) |
| 4th Quartile | 115 | 190 823 | 0.70 (0.54–0.89) |
| Ptrend | 0.007 | ||
Abbreviations: CI=confidence interval; HR=hazard ratio.
a
Model adjusted for age at baseline interview (in years), baseline interview year (1993–1995, 1996–1998), father's dialect (Cantonese, Hokkien), gender, and education (no formal education, primary education, ⩾secondary education).