Zero problems with compositional data of physical behaviors: a comparison of three zero replacement methods

Table 1 Characteristics of the study sample (n = 1310)

Variable	n	%	Mean (SD)	Range
Age in years	1296		45.1 (10.1)	[18.0; 71.0]
BMI in kg/m²	1257		26.7 (4.8)	[15.4; 45.1]
Sex
Men	542	42
Women	754	58
Cohort
NOMAD	230	18
DPhacto	686	52
DOSES	394	30
Working sector
Cleaning	159	12
Manufacturing	540	41
Transportation	73	6
Health Service	409	31
Assemblers	33	3
Construction	39	3
Garbage Collectors	27	2
Mobile Plant Operators	10	1
Other^A	20	2

BMI body mass index, SD standard deviation. ^AIncludes general office clerks and other elementary workers

ISSN: 1479-5868