Table 1 Demographic data of the Hyaluronic acid-carboxymethylcellulose (HA/CMC) group and the control group

Age (years), mean ± SD

67.5 ± 9.3

65.4 ± 10.5

0.542

BMI (kg/m²), mean ± SD

24.7 ± 2.9

25.1 ± 2.6

0.453

Combined disease, n (%)

 DM

6

4

0.480

 Cardiovascular dis.

8

7

0.758

 Gastrointestinal dis., hepatitis

12

10

0.569

Smoking history

 Current smoker

10

12

0.569

 Non-smoker

15

13

ASA physical status classification

 1

14

17

0.382

 2

11

8

 3–6

0

0