Table 2 Risk of all-cause mortality among the elderly adults with different sleep duration, a cohort study in China, 2005-2019

Whole population

Short (≤ 6h)

1340/9518

1.08 (1.01-1.14)

1.07 (1.00-1.13)

1.02 (0.96-1.09)

Moderate (7-8h)

4578/35942

Ref.

Ref.

Ref.

Long (> 8h)

4806/22567

1.20 (1.15-1.25)

1.17 (1.12-1.22)

1.13 (1.09-1.18)

Male

Short (≤ 6h)

485/3642

1.13 (1.02-1.25)

1.09 (0.99-1.21)

1.02 (0.92-1.13)

Moderate (7-8h)

1867/16294

Ref.

Ref.

Ref.

0.0300

Long (> 8h)

1755/9759

1.14 (1.07-1.22)

1.11 (1.04-1.19)

1.08 (1.01-1.15)

Female

Short (≤ 6h)

855/5876

1.05 (0.97-1.14)

1.06 (0.98-1.14)

1.02 (0.94-1.10)

Moderate (7-8h)

2711/19648

Ref.

Ref.

Ref.

Long (> 8h)

3051/12808

1.24 (1.18-1.31)

1.20 (1.14-1.26)

1.17 (1.11-1.23)

Age at baseline, <80 years

Short (≤ 6h)

132/3774

1.13 (0.93-1.37)

1.07 (0.88-1.30)

1.04 (0.85-1.26)

Moderate (7-8h)

452/15585

Ref.

Ref.

Ref.

0.0034

Long (> 8h)

221/5518

1.29 (1.10-1.52)

1.25 (1.06-1.47)

1.20 (1.02-1.41)

Age at baseline, 80-89 years

Short (≤ 6h)

371/2867

1.02 (0.90-1.14)

1.01 (0.90-1.13)

0.95 (0.85-1.07)

Moderate (7-8h)

1155/9203

Ref.

Ref.

Ref.

Long (> 8h)

949/6020

1.17 (1.07-1.28)

1.12 (1.03-1.23)

1.10 (1.00-1.20)

Age at baseline, 90-99 years

Short (≤ 6h)

458/1827

1.11 (1.00-1.23)

1.10 (0.99-1.22)

1.04 (0.94-1.16)

Moderate (7-8h)

1631/7085

Ref.

Ref.

Ref.

Long (> 8h)

1775/6265

1.21 (1.13-1.30)

1.17 (1.10-1.26)

1.12 (1.05-1.20)

Age at baseline, ≥100 years

Short (≤ 6h)

379/1049

1.10 (0.98-1.23)

1.11 (0.98-1.24)

1.06 (0.95-1.20)

Moderate (7-8h)

1340/4069

Ref.

Ref.

Ref.

Long (> 8h)

1861/4763

1.19 (1.11-1.28)

1.16 (1.08-1.25)

1.14 (1.06-1.23)