Table 2.

Sensitivity analyses of duration of follow up in association with odds of death

Duration of follow up	Odds ratio	95% CI
0-2 weeks	1.25	0.50 to 3.13
2-4 weeks	0.41	0.08 to 2.07
1-3 months	0.77	0.32 to 1.83
3-6 months	0.53	0.34 to 0.83
>6 months	0.78	0.36 to 1.72