Table 1.

Sample characteristics

	Total (n = 304)		PCS yes (n = 210)		PCS no (n = 94)
	n	%	n	%	n	%	p-value
Sex							0.09041
Male	127	41.78	81	38.57	46	48.94
Female	177	58.22	129	61.43	48	51.06
Age
Median (IQR)	52	(40;59)	52	(40;59)	52	(39;60)	0.34552
Mean (SD)	49.41	(14.52)	48.92	(14.57)	50.49	(14.45)
Education							0.62781
<= 9 years	52	17.10	40	19.05	18	19.15
> 9 years	252	82.89	170	80.95	76	80.85
Living alone, yes	69	22.70	45	21.74	24	25.81	0.43881
Smoking							0.27921
Never smoker	160	52.63	108	51.43	52	55.32
Ex-smoker	123	40.46	90	42.86	33	35.11
Current smoker	21	6.91	12	5.71	9	9.57
Body Mass Index							0.03061
<= 30 kg/m²	254	83.55	169	80.48	85	90.43
> 30 kg/m²	50	16.45	41	19.52	9	9.57
Comorbidities
Hypertension	64	21.12	41	19.62	23	24.47	0.33861
Diabetes	14	4.62	11	5.26	3	3.19	0.56111
Myocardial infarction	7	2.31	6	2.87	1	1.06	0.33281
Coronary artery disease	16	5.28	14	6.70	2	2.13	0.16221
Stroke	6	1.98	4	1.91	2	2.13	1.00001
Anxiety disorder	18	5.94	15	7.18	3	3.19	0.05601
Chronic bronchitis	19	6.29	17	8.17	2	2.13	0.07711
Depression	27	8.88	23	10.95	4	4.26	0.02801
Autoimmune disorder	28	9.24	20	9.57	8	8.51	0.88771
Cancer	15	4.93	10	4.76	5	5.32	0.62591
Recurrent COVID-19	73	24.58	54	26.47	19	20.43	0.53321
Time between first positive PCR test and follow-up survey							0.66793
> 12 to < = 15 months	8	2.63	5	2.38	3	3.19
> 15 bis < = 18 months	13	4.28	10	4.76	3	3.19
> 18 bis < = 21 months	74	24.34	56	26.67	18	19.15
> 21 bis < = 24 months	52	17.11	32	15.24	20	21.28
> 24 bis < = 27 months	62	20.39	43	20.48	19	20.21
> 27 bis < = 30 months	94	30.92	63	30.00	31	32.98
> 30 months	1	0.33	1	0.48	0	0
Median (IQR)	26	(20.5;27.2)	25.91	(20.15;27.16)	26.02	(20.71;27.16)	0.51342
Mean (SD)	23.75	(3.92)	23.66	(3.97)	23.96	(3.80)
Min/Max		14.1/30.2		14.1/30.2		14.20/29.82

PCS: Post Covid-19 syndrome

¹Chi-Square test; ²Mann-Whitney U-test; ³Fisher’s exact test