Table 1 Subject Characteristics

Variable

Mean

(SD)

Age (years)

63.3

(10.5)

Body mass index (kg/m²)

27.8

(4.3)

Sleep duration (hours)

7.01

(1.16)

Total T (nmol/L)

16.4

(6.2)

Frailty (frailty index)

0.15

(0.12)

N

(%)

Depression

 BDI¹ < 10

1905

(79.6)

 BDI¹ > 11

465

(19.4)

Frequency of alcohol consumption

  < 5 days a week

1,368

(57.2)

  > 5 days a week

732

(30.6)

Smoking

 Non-smoker

1,961

(82.0)

 Current smoker

395

(16.5)

Pain

 No pain

917

(38.3)

 Some pain

1121

(46.8)

 Chronic widespread pain

211

(8.8)

Sleep score

 0 – 4

1372

(57.3)

 5 – 9

664

(27.8)

 10 – 14

256

(10.7)

 15 – 20

101

(4.2)

Sleep duration

 Short (< 6 h)

204

(8.5)

 Normal (≥ 6 & < 9 h)

2027

(84.7)

 Long (≥ 9 h)

162

(6.8)

Testosterone

 (> 10.5 nmol/L)

2006

(83.8)

 (≤ 10.5 nmol/L)

345

(14.4)