Table 3.

Results of interaction and subgroup analyses.

Characteristic	OR (95% CI)	P for interaction
Sex		0.004
Male	0.975 (0.950, 1.002)
Female	1.012 (0.988, 1.037)
Age range		0.2003
18-40	1.057 (0.988, 1.131)
41-60	0.986 (0.956, 1.017)
61-80	0.999 (0.974, 1.025)
> 81	0.954 (0.888, 1.024)
Race		0.6447
White	0.998 (0.977, 1.020)
Asian	1.023 (0.869, 1.204)
African American	0.959 (0.896, 1.026)
Unknown	0.981 (0.937, 1.027)
Diabetes		0.1382
No	1.001 (0.981, 1.022)
Yes (Noninsulin-dependent)	0.940 (0.885, 0.998)
Yes (Insulin-dependent)	0.990 (0.935, 1.048)
Smoking status		0.4939
No	0.992 (0.972, 1.014)
Yes	1.008 (0.970, 1.048)
Severe COPD		0.3361
No	0.997 (0.978, 1.016)
Yes	0.968 (0.914, 1.026)
Hypertension		0.1216
No	1.010 (0.982, 1.038)
Yes	0.981 (0.958, 1.005)
Disseminated cancer		0.7233
No	0.991 (0.966, 1.016)
Yes	0.997 (0.971, 1.025)
Steroid use		0.0944
No	0.984 (0.963, 1.005)
Yes	1.018 (0.984, 1.052)
Emergency case		0.4764
No	0.989 (0.970, 1.009)
Yes	1.011 (0.957, 1.068)
White blood cell count		0.2992
WBC < 10	1.003 (0.977, 1.030)
WBC >10	0.984 (0.959, 1.009)