Table 3.

Duration of symptoms after the index consultation and unresolved symptoms at day 28 in patients with and without pertussis

	Median duration of symptoms after the index consultation, days (IQR)				Unresolved symptoms at day 28, N (%)				Missing
	Pertussis present	Pertussis absent	Hazard ratio (95% CI)	P-value	Pertussis present	Pertussis absent	Odds ratio (95% CI)	P-value	N (%)
	Cough	17 (10–28)	12 (7–21)	0.68 (0.51 to 0.91)	0.008	29/79 (37)	463/2431 (19)	2.47 (1.54 to 3.94)	<0.001	6 (0.2)
Phlegm	12 (5–26)	9 (5–17)	0.70 (0.53 to 0.92)	0.010	26/79 (33)	358/2424 (15)	2.83 (1.75 to 4.59)	<0.001	13 (0.5)
Shortness of breath	1 (0–11)	1 (0–5)	0.75 (0.57 to 0.98)	0.037	17/79 (22)	209/2417 (9)	2.90 (1.66 to 5.05)	<0.001	20 (0.8)
Wheeze	2 (0–10)	2 (0–7)	0.83 (0.65 to 1.06)	0.143	12/79 (15)	135/2419 (6)	3.03 (1.60 to 5.74)	0.001	18 (0.7)
Chest pain	1 (0–2)	1 (0–1)	0.99 (0.78 to 1.27)	0.962	5/79 (6)	98/2411 (4)	1.60 (0.63 to 4.03)	0.324	26 (1.0)
Muscle aches	1 (0–8)	3 (0–7)	0.91 (0.72 to 1.15)	0.417	6/79 (8)	126/2410 (5)	1.49 (0.64 to 3.49)	0.359	27 (1.1)
Headache	2 (0–8)	3 (0–7)	0.99 (0.78 to 1.25)	0.918	6/79 (8)	115/2416 (5)	1.65 (0.70 to 3.86)	0.253	21 (0.8)
Disturbed sleep	7 (2–14)	5 (1–9)	0.73 (0.57 to 0.94)	0.013	10/79 (13)	164/2416 (7)	1.99 (1.01 to 3.94)	0.048	21 (0.8)
Interference with normal activities or work	6 (1–12)	5 (1–9)	0.76 (0.60 to 0.98)	0.033	12/79 (15)	132/2413 (6)	3.10 (1.63 to 5.86)	0.001	24 (1.0)

IQR = interquartile range. P < 0.05 significant.