Table 1 Socio-demographic, clinical and healthcare use characteristics of centenarians, by sex. Means are accompanied by their 95% confidence intervals in brackets

 N

351

1329

<0.001

 Mean age, years^a

101.7 (101.5–101.9)

101.6 (101.5–101.7)

n.s.^b

 Urban residence, %

58.7%

56.7%

n.s.

 Deprivation index, %^c

n.s.

  Q1

29.1%

31.1%

  Q2

23.7%

22.8%

  Q3

24.0%

20.7%

  Q4

23.1%

25.6%

 Without chronic diseases, %

7.6%

5.2%

n.s.

 Chronic diseases, mean^a

3.97 (3.65–4.28)

3.97 (3.81–4.12)

n.s.

 With multimorbidity, %

78.0%

81.3%

n.s.

 Without chronic medications, %

8.1%

6.4%

n.s.

 Chronic drugs, mean^a

4.94 (4.56–5.33)

4.77 (4.58–4.95)

n.s.

 With polypharmacy, %^d

49.8%

49.5%

n.s.

 With potentially inappropriate medications, %^a,e

71.1%

72.3%

n.s.

 Potentially inappropriate medications, mean^a

1.32 (1.19–1.45)

1.36 (1.29–1.43)

n.s.

 Anticholinergic Drug Scale score, %

n.s.

  0

50.6%

50.2%

  1

28.2%

29.5%

  2

12.4%

12.3%

  ≥3

8.8%

8.0%

 Anticholinergic Cognitive Burden score, %

n.s.

  0

55.3%

52.3%

  1

26.0%

28.8%

  2

6.2%

8.5%

  ≥3

12.5%

10.4%

 Users of primary care services, %

76.1%

79.4%

n.s.

  Visits to GP^f, mean^a

10.6 (9.4–11.7)

10.8 (10.2–11.5)

n.s.

  Visits to nurse, mean^a

9.3 (7.8–10.9)

12.1 (10.9–13.3)

n.s.

 Users of specialities, %

24.5%

22.3%

n.s.

  Visits to a specialist, mean^a

2.79 (2.16–3.43)

2.72 (2.44–2.99)

n.s.

  Different specialties visited, mean^a

1.37 (1.23–1.51)

1.47 (1.37–1.57)

n.s.

 Users of hospital, %

14.8%

12.1%

n.s.

  Total hospital admissions, mean^a

1.35 (1.17–1.52)

1.34 (1.23–1.45)

n.s.

  Scheduled hospital admissions, mean^a

0.06 (0.00–0.12)

0.12 (0.06–0.17)

n.s.

  Length of stay in days, mean^a

10.0 (7.9–12.0)

11.6 (10.3–13.0)

n.s.

 Users of emergency room, %

11.7%

8.3%

n.s.

  Visits to emergency room, mean^a

1.80 (1.40–2.21)

1.45 (1.28–1.62)

n.s.