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. 2021 Nov 9;11(11):e049157. doi: 10.1136/bmjopen-2021-049157

Table 1.

Patient’s demographic data

Parameters Total n=24 691 Males n=10 853 Females n=13 838
Age at examination (years old) 79.4±4.3 (75–103) 79.2±4.0 (75–101)* 79.6±4.5 (75–103)
Age categories, n (%)
75–79 14 932 (60.5) 6757 (62.3)* 8175 (59.1)
80–84 6554 (26.5) 2892 (26.6)* 3662 (26.5)
85≤ 3205 (13.0) 1204 (11.1)* 2001 (14.5)
BMI (kg/m2) 22.2±3.1 (11.6–54.2) 22.4±2.9 (13–54.2)* 22.0±3.2 (11.6–43)
BMI categories
Underweight (BMI <18.5) 2684 (10.9) 910 (8.4)* 1774 (12.8)
Normal weight (18.5≤BMI < 25) 17 997 (71.6) 7980 (73.5)* 9687 (70.0)
Overweight and obese (25≤BMI) 4340 (17.6) 1963 (18.1)* 2377 (17.1)
CCI 1.7±1.7 (0–11) 1.9±1.8 (0–11)* 1.5±1.5 (0–10)
CCI categories, n (%)
Low (0) 4710 (19.1) 1907 (17.6)* 2803 (20.3)
Medium (1–2) 12 982 (52.6) 5226 (48.2)* 7756 (56.1)
High (3–4) 5331 (21.6) 2772 (25.1)* 2609 (18.9)
Very high (≥5) 1668 (6.8) 998 (9.2)* 670 (4.8)
Smoking (yes), n (%) 1891 (7.7) 1586 (14.6)* 305 (2.2)
Use of alcohol (yes), n (%) 9444 (38.2) 6447 (59.4)* 2997 (21.7)
Osteoporosis, n (%) 3969 (16.1) 374 (3.4)* 3595 (26.0)
Follow-up duration (year) 6.9±1.6 (0.1–8.0) 6.6±1.8 (0.1–8.0)* 7.0±1.4 (0.1–8.0)

Continuous values are expressed as mean±standard deviation (range).

*Significantly different between males and females (p<0.05).

BMI, body mass index; CCI, Charlson Comorbidity Index.