Table 1.

Baseline characteristics of the study population

	Total, N = 543–653	BMI <25, N = 191–217	BMI 25–30, N = 229–275	BMI >30, N = 111–137
Age, mean (SD)	70.3 (8.2)	70.8 (8.8)	70.1 (8.0)	69.5 (7.8)
Gender (% women)	74.2	80.3	68.9	73.0
Education, mean (%)
Lower	322 (54.8)	87 (43.3)	147 (58.6)	77 (62.6)
Secondary	201 (34.2)	88 (43.8)	72 (28.7)	40 (32.5)
Higher	65 (11.1)	26 (12.9)	32 (12.7)	6 (9.0)
BMI, mean (SD)	27.0 (4.1)	22.9 (1.7)	27.2 (1.3)	33.0 (2.9)
Comorbidity, mean (%)
None	181 (27.7)	50 (23.5)	77 (28.0)	36 (26.3)
1–2	263 (40.3)	98 (46.0)	111 (40.4)	50 (36.5)
>2	209 (32.0)	65 (30.5)	87 (31.6)	51 (37.2)
Complications, mean (%)
Yes	47 (7.2)	13 (6.2)	25 (9.1)	9 (6.6)
No	603 (92.8)	198 (93.8)	249 (90.9)	128 (93.4)