Occupational exposures and determinants of ultrafine particle concentrations during laser hair removal procedures

Table 3 Results of Univariate Models Examining Predictors of UFP Concentrations During LHR Procedures

Predictor	Effect estimate (Particles/cm³)	Standard error	p-value	R ²
Body part				0.867
Abdomen	−45,042.5	23,450.8	0.103
Back	−6,855.1	20,309.0	0.747
Bikini	−9,299.4	19,147.5	0.644
Face	−30,528.2	19,147.5	0.162
Legs	54,554.8	20,309.0	0.036
Underarm	0.0 Ref.
Laser and lotion use				0.361
Alexandrite laser without lotion	38,614.2	16,236.9	0.039
Diode laser with lotion	0.0 Ref.
Smoke evacuator use				0.046
No evacuator use	14,781.6	21,035.3	0.498
Evacuator Use	0.0 Ref.
Procedure duration^a				0.588
1 min increase	3,643.4	1,016.6	0.006

Each predictor, or set or predictors was assessed in separate generalized linear regression models
^aExcluding a 34-min bikini procedure

ISSN: 1476-069X