Table 3.

Predicted Days of Duration of Acute Cough Illness by Vignette, Illness Characteristics, and Patient Characteristics

Characteristics	No.	Predicted Duration Mean (95% CI)	P Value
Vignettes
Yellow sputum and fever	58	7.2 (5.8–8.6)	.45
Yellow sputum and no fever	66	7.9 (6.1–9.7)
Green sputum and fever	69	8.3 (6.8–9.8)
Green sputum and no fever	53	9.3 (7.5–11.1)
Dry cough and fever	80	6.9 (5.6–8.2)
Dry cough and no fever	69	8.4 (6.0–10.7)
ACI characteristics
Green sputum	122	8.7 (7.6–9.9)	.06
Other	273	7.6 (6.7–8.4)
Yellow sputum	124	7.6 (6.4–8.7)	.25
Other	271	8.1 (7.2–9.0)
Dry cough	149	7.6 (6.3–8.9)	.21
Other	246	8.1 (7.3–9.0)
Fever	207	7.5 (6.6–8.3)	.08
No fever	188	8.5 (7.3–9.6)
Self-reported previous use of antibiotics for ACI
Yes	246	8.7 (7.7–9.7)	.004
No	149	6.7 (5.9–7.6)
Self-reported asthma or chronic lung disease
Yes	43	10.9 (7.1–14.6)	.002
No	352	7.6 (6.9–8.2)
Annual income
$75,000 or higher	174	7.7 (6.9–8.6)	.31
Less than $75,000	221	8.1 7.0–9.1)
Sex
Male	136	6.4 (5.5–7.4)	.001
Female	259	8.7 (7.8–9.6)
Race
White	262	8.7 (7.8–9.7)	.001
Nonwhite	133	6.4 (5.5–7.2)
Educational attainment
College or professional	157	7.1 (6.3–7.9)	.03
Some college or less	238	8 .5 (7.4–9.5)

ACI = acute cough illness.