. 2022 Nov 30;20:465. doi: 10.1186/s12916-022-02664-y

Table 1.

Baseline characteristics (frequencies and percentages) of participants who completed the 3-month questionnaire, overall and stratified by SARS-CoV-2 status

Characteristics at/prior to PCR testing	Total population (N=7139)		SARS-CoV-2 negative (N=3893)		SARS-CoV-2 positive (N=3246)
Characteristics at/prior to PCR testing	N	%	N	%	N	%
Sex
Male	2646	37.06	1444	37.09	1202	37.03
Female	4493	62.94	2449	62.91	2044	62.97
Age (years)
11–13	2212	30.98	1255	32.24	957	29.47
14–15	1883	26.38	997	25.61	886	27.30
16–17	3044	42.64	1641	42.15	1404	43.22
Index of Multiple Deprivation
Quintile 1 (most deprived)	1471	20.61	785	20.16	686	21.13
Quintile 2	1422	19.92	761	19.55	661	20.36
Quintile 3	1367	19.15	764	19.62	603	18.58
Quintile 4	1377	19.29	752	19.32	625	19.25
Quintile 5 (least deprived)	1502	21.04	831	21.35	671	20.67
Ethnicity
White	5279	73.95	2908	74.70	2371	73.04
Asian/Asian British	1064	14.90	550	14.13	514	15.83
Black/African/Caribbean	267	3.74	151	3.88	116	3.57
Mixed	358	45.01	203	5.21	155	4.78
Others	118	1.65	55	1.41	63	1.94
Preferred not to say	53	0.74	26	0.67	27	0.83
Self-rated physical health
Very good	2443	34.22	1326	34.06	1117	34.41
Good	3017	42.26	1653	42.46	1364	42.02
Okay	1526	21.38	828	21.27	698	21.50
Poor/very poor	153	2.14	86	2.21	67	2.06
Self-rated mental health
Very good	1789	25.06	960	24.66	829	25.54
Good	2634	36.90	1453	37.32	1181	36.38
Okay	2053	28.76	1109	28.49	944	29.08
Poor/very poor	663	9.29	371	9.53	292	9.00
Loneliness^a
Never	2079	29.12	1113	28.59	966	29.76
Hardly ever	2092	29.30	1119	28.74	973	29.98
Occasionally	1249	17.50	696	17.88	553	17.04
Some of the time	1229	17.22	675	17.34	554	17.07
Often/always	490	6.86	290	7.45	200	6.16
Number of symptoms at testing
0	5673	79.46	3564	91.55	2109	64.97
1–4	556	7.79	178	4.58	378	11.65
5+	910	12.75	151	3.88	759	23.38
Mobility^b
No problems	6800	95.25	3694	94.89	3106	95.69
Some/a lot of problems	339	4.75	199	5.11	140	4.31
Looking after self^b
No problems	6837	95.77	3714	95.40	3123	96.21
Some/a lot of problems	302	4.23	179	4.60	123	3.79
Doing usual activities^b
No problems	6382	89.40	3487	89.57	2895	89.19
Some/a lot of problems	757	10.60	406	10.43	351	10.81
Having pain^b
No problems	6118	85.70	3342	85.85	2776	85.52
Some/a lot of problems	1021	14.30	551	14.15	470	14.48
Feeling worried/sad^b
No problems	4261	59.69	2331	59.88	1930	59.46
A bit	2421	33.91	1291	33.16	1130	34.81
Very worried/sad	457	6.40	271	6.96	186	5.73

^aFrom the UCLA Loneliness scale

^bFrom the EQ-5D-Y scale