| Aharon et al., 2020 [24] |
Cross-sectional |
General population |
Israel and Italy |
1015 |
PHQ-4, SF-8 |
50.2% of Italian and 42.2% of Israelis |
| Albagmi et al., 2012 [25] |
Cross-sectional |
General population |
Saudi Arabia |
3017 |
GAD-7 |
80% (mild), 11.4% (moderate), 8.2% (severe) |
| Alshekaili et al., 2020 [26] |
Cross-sectional |
Healthcare workers |
Oman |
1139 |
DASS-21 |
34.1% |
| Antonijevic et al., 2020 [27] |
Cross-sectional |
Healthcare workers |
Serbia |
1678 |
GAD-7 |
43.31% (minimal), 30.9% (mild), 12.99% (moderate),12.8% (severe). |
| Ausin et al., 2020 [28] |
longitudinal |
General population |
Spain |
1041 |
GAD-2 |
N/A |
| Batterham et al., 2021 [29] |
longitudinal |
General population |
Australia |
1296 |
GAD-7, PHQ-9 |
77% |
| Bendau et al., 2020 [11] |
Longitudinal |
General population |
Germany |
2376 |
GAD-2, PHQ-4 |
N/A |
| Budimir et al., 2021 [30] |
Cross-sectional |
General population |
Austria and UK |
2011 |
GAD-7 |
18.9% UK and 6% Austria |
| Cai et al., 2020 [31] |
case-control |
Healthcare workers |
China |
2346 |
BAI |
Frontline 15.7%, non-frontline 7.4% |
| Canet-Juric et al., 2020 [32] |
longitudinal |
General population |
Argentina |
6057 |
STAI |
N/A |
| Cao et al., 2020 [33] |
Cluster Sampling |
University Students |
China |
7143 |
GAD-7 |
Mild (21.3%), moderate (2.7%), severe (0.9%) |
| Chen et al., 2021 [34] |
Cross-sectional |
General population (quarantined) |
China |
1837 |
STAI |
16.3% |
| Chew et al., 2020 [35] |
Cross-sectional |
Healthcare workers |
India, Indonesia, Singapore, Malaysia and Vietnam |
1146 |
DASS-21 |
India (0.8%), Singapore (3.6%), Vietnam (6.7%), Indonesia (6.8%) and Malaysia (14.9%) |
| Dawel et al., 2020 [36] |
longitudinal |
General population |
Australia |
1296 |
GAD-7, PHQ-9, WHO-5 |
N/A |
| Denning et al., 2021 [37] |
Cross-sectional |
Healthcare workers |
UK, Poland and Singapore |
3537 |
HADS |
20% |
| Di Blasi et al., 2021 [38] |
longitudinal |
General population |
Italy |
1129 |
DASS-21 |
N/A |
| Di Giuseppe et al., 2020 [39] |
Cross-sectional |
General population |
Italy |
5683 |
SCL-90 |
51.1% |
| Di Mattei et al., 2021 [40] |
Baseline assessment |
Healthcare workers |
Italy |
1055 |
DASS-21 |
69.4% |
| Fiorillo et al., 2020 [41] |
longitudinal |
General population |
Italy |
20,720 |
DASS-21, GHQ |
Moderate (16.7%) and severe or extremely severe (17.6%) |
| Fisher et al., 2020 [42] |
Cross-sectional |
General Population |
Australia |
13,829 |
GAD-7, PHQ-9 |
21% |
| Fu et al., 2020 [43] |
Cross-sectional |
General population |
China |
1242 |
GAD-7, PHQ-9 |
27.6% |
| Fu et al., 2021 [44] |
Cross-sectional |
University students |
China |
89,588 |
GAD-7 |
41.1% |
| Gainer et al., 2021 [45] |
Cross-sectional |
Healthcare workers |
US |
1724 |
GAD-7, PHQ-9 |
36.5% |
| Garcia-Fernandez et al., 2020 [46] |
Cross-sectional |
Elderly population |
Spain |
1639 |
HARS |
N/A |
| Garcia-Fernandez et al., 2020 [47] |
Cross-sectional |
General population |
Spain |
1635 |
HARS |
N/A |
| Giardino et al., 2020 [48] |
Cross-sectional |
Healthcare workers |
Argentina |
1059 |
DASS-18 |
76.5% |
| Gundogmus et al., 2021 [49] |
longitudinal |
Healthcare Workers |
Turkey |
2460 |
DASS-21 |
29.6% |
| Hacimusalar et al., 2020 [50] |
Cross-sectional |
Healthcare, non-healthcare |
Turkey |
2156 |
STAI |
89.5% |
| Halperin et al., 2021 [51] |
Cross-sectional |
University students |
US |
1428 |
GAD-7, PHQ-9 |
30.6% |
| Hammarberg et al., 2020 [52] |
Cross-sectional |
General population |
Australia |
13,762 |
GAD-7 |
21.8% females, 14.2% males |
| Hassannia et al., 2021 [53] |
Cross-sectional |
Healthcare workers and general population |
Iran |
2045 |
HADS |
65.6% |
| He et al., 2021 [54] |
Cross-sectional |
Healthcare workers |
China |
1971 |
GAD-7 |
29.3% |
| Hennein et al., 2021 [55] |
Cross-sectional |
Healthcare workers |
US |
1092 |
GAD-7 |
15.6% |
| Huang et al., 2021 [56] |
Cross-sectional |
Healthcare workers |
Singapore |
1638 |
GAD-7 |
12.5% |
| Islaml et al., 2020 [57] |
Cross-sectional |
University students |
Bangladesh |
3122 |
DASS-21 |
Mild anxiety (71.5%), moderate (63.6%), severe (40.3%) and very severe (27.5%). |
| Jacques-Avino et al., 2020 [58] |
Cross-sectional |
General population |
Spain |
7053 |
GAD-7 |
31.2% females, 17.7% males |
| Jia et al., 2020 [59] |
Cross-sectional |
General population |
UK |
3097 |
GAD-7 |
57% (26% moderate to severe anxiety) |
| Jiang et al., 2020 [60] |
Cross-sectional |
General population |
China |
60,199 |
SAI |
Mild (33.21%), moderate (41.27%) and severe (22.99%). |
| Johnson et al., 2021 [61] |
longitudinal |
Parents |
Norway |
2868 |
GAD-7 |
N/A |
| Kantor and Kantor, 2020 [62] |
Cross-sectional |
General population |
US |
1005 |
GAD-7 |
52.1% mild, 26.8% anxiety disorder |
| Karaivazoglou et al., 2021 [63] |
Cross-sectional |
General population |
Greece |
1443 |
HADS |
20% |
| Khubchandani et al. 2021 [64] |
Cross-sectional |
General population |
US |
1978 |
GAD-2, PHQ-4 |
42% |
| Kim et al., 2021 [65] |
longitudinal |
University Students |
US |
8613 |
GAD |
No significant changes were found in the rates of anxiety from before the pandemic. |
| Lai et al., 2020 [66] |
Cross-sectional |
Healthcare workers |
China |
1257 |
GAD-7 |
44.6% |
| Lei et al., 2020 [67] |
Cross-sectional |
General population |
China |
1593 |
SAS |
8.3% |
| Li et al., 2020 [68] |
Cross-sectional |
Teachers |
China |
88,611 |
GAD-7 |
13.67% |
| Li et al., 2021 [69] |
Cross-sectional |
General population |
China |
1201 |
DASS-21 |
34.2% |
| Liu et al., 2021 [70] |
Cross-sectional |
Healthcare workers |
China |
1090 |
GAD-7 |
13.3% |
| Liu et al., 2020 [71] |
Cross-sectional |
Healthcare workers (paediatric) |
China |
2031 |
DASS-21 |
18.3% |
| Lu et al., 2020a [72] |
Cross-sectional |
General population and frontline workers |
China |
1417 |
GAD-7 |
52.1% of the general public and 56% of frontline workers |
| Lu et al., 2020b [73] |
Cross-sectional |
Healthcare workers |
China |
2299 |
HAMA |
22.6% of medical staff showed mild to moderate anxiety and 2.9% were severe |
| Luceno-Moreno et al., 2020 [74] |
Cross-sectional |
Healthcare workers |
Spain |
1422 |
HADS |
58.6% healthcare workers presented with an anxiety disorder. |
| Mattila et al., 2020 [75] |
Cross-sectional |
Healthcare workers |
Finland |
1995 |
GAD-7 |
30% mild anxiety, 10% moderate and 5% severe anxiety. |
| Meesala et al., 2021 [76] |
Cross-sectional |
General population |
India |
1346 |
CAS-7 |
N/A |
| Mosheva et al., 2020 [77] |
Cross-sectional |
Healthcare workers |
Israel |
1106 |
PROMIS |
52.8% |
| Ngoc Cong Duong et al., 2020 [78] |
Cross-sectional |
General population |
Vietnam |
1385 |
DASS-21 |
14.1% |
| Nkire et al., 2021 [79] |
Cross-sectional |
General population |
Canada |
6041 |
GAD-7 |
46.7% |
| Odriozola-Gonzalez et al., 2020 [80] |
Cross-sectional |
University students and workers. |
Spain |
2530 |
DASS-21, IES |
21.34% |
| Ozamiz-Etxebarria et al., 2021 [81] |
Cross-sectional |
Teachers |
Spain |
1633 |
DASS-21 |
49.5% (8.1% extreme severe and 7.6% severe) |
| Ozamiz-Etxebarria et al., 2020 [82] |
longitudinal |
General population |
Spain |
1933 |
DASS-21 |
26.9% |
| Pandey et al., 2020 [83] |
Cross-sectional |
General population |
India |
1395 |
DASS-21 |
Anxiety prevalence was 22.4% in the second week and 26.6% in the third week of lockdowns |
| Passavanti et al., 2021 [84] |
Cross-sectional |
General population |
Australia, Iran, China, Ecuador, Italy, Norway and the US |
1612 |
DASS-21 |
44.7% (5.2% mild, 17.4% moderate, 5.8% severe and 16.3% extremely severe). |
| Pieh et al., 2021 [85] |
Cross-sectional |
General population |
UK |
1006 |
GAD-7 |
39% |
| Peih et al., 2020 [86] |
Cross-sectional |
General population |
Austria |
1005 |
GAD-7 |
19% |
| Planchuelo-Gomez et al., 2020 [87] |
longitudinal |
General population |
Spain |
4724 |
DASS-21 |
49.66% |
| Robb et al., 2020 [88] |
Cross-sectional |
Elderly population |
UK |
7127 |
HADS |
N/A |
| Rossi et al., 2020 [89] |
Cross-sectional |
Healthcare workers and general population |
Italy |
24,050 |
GAD-7 |
21.25% in the general population, 18.05% in second line healthcare workers and 20.55% in frontline workers. |
| Ruengorn et al., 2020 [90] |
Cross-sectional |
General population |
Thailand |
2303 |
GAD-7 |
56.9% |
| Serafim et al., 2021 [91] |
Cross-sectional |
General population |
Brazil |
3000 |
DASS-21 |
39.7% |
| Shen et al., 2020 [92] |
Cross-sectional |
Healthcare Workers |
China |
1637 |
SAS |
10.02% |
| Sinawi et al., 2021 [93] |
Cross-sectional |
General Population |
Oman |
1538 |
GAD-7 |
22% |
| Solomou et al., 2020 [94] |
Cohort study |
General population |
Cyprus |
1642 |
GAD-7 |
41% mild, 23.1% moderate-severe |
| Sun et al., 2021 [95] |
Cross-sectional |
University Students |
China |
1912 |
GAD-7 |
34.73% |
| Tang et al., 2020 [96] |
Cross-sectional |
General population |
China |
1389 |
GAD-7 |
70.78% |
| Van der Velden et al., 2020 [97] |
Longitudinal |
General population |
Holland |
3983 |
GAD-7 |
No significant anxiety found |
| Wang et al., 2021a [98] |
Case-control |
General population |
China |
1674 |
ADS |
27% in quarantined, 11.2% in general population |
| Wang et al., 2021b [99] |
Cross-sectional |
Healthcare workers |
China |
1063 |
GAD-7 |
48.7% in patients, 25.7% general population, 13.3% healthcare |
| Wang et al., 2020 [100] |
Cross-sectional |
General, covid and health |
China |
49,015 |
DASS-21 |
10.02% |
| Wanigasooriya et al., 2021 [101] |
Cross-sectional |
Healthcare workers |
UK |
2638 |
PHQ-4 |
34.31% |
| Warren et al., 2021 [102] |
Cross-sectional |
General population |
United States |
5023 |
PHQ-4 |
14.4% |
| Wathelet et al., 2020 [103] |
Cross-sectional |
University Students |
France |
69,054 |
STAI |
27.47% |
| Wu et al., 2020 [104] |
Cross-sectional |
General population |
China |
24,789 |
STAI |
51.6% |
| Yuan et al., 2020 [105] |
Cross-sectional |
Police |
China |
3517 |
HADS |
8.79% |
| Zhang et al., 2020a [106] |
Cross-sectional |
Healthcare workers |
China |
2143 |
GAD-7 |
14.23% |
| Zhang et al., 2020b [107] |
Cross-sectional |
General population |
China |
123,768 |
GAD-7 |
3.4% |
| Zhou et al., 2020 [108] |
Cross-sectional |
Healthcare workers |
China |
1705 |
SAS |
45.4% |
| Zilver et al., 2021 [109] |
Cohort study |
Pregnant women |
Holland |
1466 |
GAD-7 |
19.5% |