Table 2 Association of composite healthy lifestyle with multisystem sequelae, death, and hospitalization following SARS-CoV-2 infection in key clinical subgroups

From: Modifiable lifestyle factors and the risk of post-COVID-19 multisystem sequelae, hospitalization, and death

Ā 

Multisystem sequelae

Death

Hospitalization

HR (95% CI)

P for interaction

HR (95% CI)

P for interaction

HR (95% CI)

P for interaction

Age, y

ā€ƒ< 65

0.74 (0.64–0.85)

0.08

<0.001

0.58 (0.39–0.85)

0.06

0.01

0.86 (0.76–0.96)

0.47

0.03

Ā 

0.51 (0.44–0.59)

0.39 (0.25–0.61)

0.69 (0.61–0.78)

ā€ƒā‰„ā€‰65

0.84 (0.76–0.93)

0.77 (0.68–0.88)

0.88 (0.81–0.97)

Ā 

0.70 (0.64–0.78)

0.61 (0.54–0.70)

0.83 (0.76–0.91)

Sex

Female

0.78 (0.69–0.89)

0.30

0.02

0.63 (0.51–0.78)

0.04

0.09

0.82 (0.73–0.92)

0.42

0.14

Ā 

0.58 (0.51–0.67)

0.52 (0.42–0.64)

0.73 (0.65–0.81)

Male

0.80 (0.72–0.89)

0.81 (0.70–0.93)

0.90 (0.82–0.99)

Ā 

0.69 (0.61–0.77)

0.62 (0.53–0.73)

0.83 (0.75–0.91)

Ethnicity

White

0.75 (0.69–0.82)

0.01

<0.001

0.74 (0.65–0.85)

0.67

0.36

0.84 (0.78–0.90)

00.04

<0.001

Ā 

0.59 (0.54–0.64)

0.58 (0.50–0.67)

0.73 (0.68–0.79)

Other ethnic groups

1.10 (0.86–1.42)

0.78 (0.61–1.01)

1.01 (0.81–1.25)

Ā 

0.93 (0.72–1.21)

0.65 (0.50–0.85)

1.02 (0.82–1.27)

Vaccine statusb

No or partial vaccination

0.88 (0.78–0.99)

0.13

0.21

0.85 (0.74–0.98)

0.02

0.04

0.89 (0.80–0.99)

0.63

0.19

Ā 

0.72 (0.63–0.81)

0.69 (0.60–0.80)

0.78 (0.70–0.87)

Full vaccination

0.75 (0.67–0.84)

0.62 (0.49–0.79)

0.86 (0.78–0.95)

Ā 

0.60 (0.53–0.67)

0.53 (0.41–0.68)

0.79 (0.72–0.87)

Test setting

Inpatient

0.80 (0.73–0.88)

0.91

0.42

0.80 (0.67–0.96)

0.87

0.33

0.89 (0.82-–0.97)

0.07

0.13

Ā 

0.64 (0.58–0.70)

0.64 (0.53–0.77)

0.80 (0.74–0.87)

Community/outpatient

0.83 (0.70–0.99)

0.78 (0.66–0.92)

0.81 (0.68–0.95)

Ā 

0.75 (0.63–0.90)

0.69 (0.58–0.83)

0.81 (0.68–0.96)

Variantsa

Wildtype, alpha, and delta

0.76 (0.69–0.84)

0.07

0.27

0.77 (0.68–0.88)

0.56

0.44

0.80 (0.73–0.87)

0.01

0.06

Ā 

0.63 (0.57–0.70)

0.60 (0.53–0.69)

0.76 (0.69–0.83)

Omicron BA.1

0.94 (0.80–1.09)

0.70 (0.51–0.95)

1.05 (0.92–1.20)

Ā 

0.72 (0.61–0.84)

0.69 (0.51–0.95)

0.89 (0.78–1.01)

  1. The first row of each category of the subgroup refers to intermediate vs unfavorable lifestyle, and the second row refers to favorable vs unfavorable lifestyle. Risk estimates were derived from the Cox model including covariates of age, sex, education level, index of multiple deprivations, ethnicity, in addition to a healthy lifestyle and a multiplicative interaction term of the healthy lifestyle with the stratification variable of interest.
  2. P values are two-sided and no statistical adjustment is made for multiple comparisons across subgroups.
  3. aThe calendar periods of dominant variants in UK were based on pandemic data from the Office for National Statistics: wildtype (March 1, 2020–December 7, 2020), alpha [B.1.1.7] (December 8, 2020–May 17, 2021), delta [B.1.617.2] (May 18, 2021–December 13, 2021), Omicron [B.1.1.529 BA.1] (December 14, 2021–March 1, 2022).
  4. bSubgroup analysis by vaccine status was conducted in participants from England, as vaccination data for Scotland and Wales were not available.