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Table 6 Linear mixed model results for self-assessed nasal and eye symptoms, and measured BUT and PNIF

From: Effects of cleaning spray use on eyes, airways, and ergonomic load

 

All subjects

Cleaning workers

Non-cleaning workers

Foam

Spray

Foam

Spray

Foam

Spray

Nasal symptoms

2.4

(-0.6 to 5.4)

p = 0.11

4.0

(1.0 to 7.1)

p = 0.009*

3.0

(-1.2 to 7.2)

p = 0.16

2.9

(-1.5 to 7.2)

p = 0.19

2.3

(-1.7 to 6.3)

p = 0.25

6.4

(2.6 to 10.2)

p = 0.002*

Eye symptoms

-0.1

(-1.5 to 1.4)

p = 0.90

0.6

(-1.0 to 2.1)

p = 0.47

-1.6

(-3.8 to 0.5)

p = 0.14

-0.8

(-3.0 to 1.4)

p = 0.48

1.9

(0.2 to 3.5)

p = 0.03*

2.3

(0.7 to 4.0)

p = 0.006*

BUT (sec)

-3.3

(-5.6 to -0.9)

p = 0.007*

-2.7

(-5.7 to 0.4)

p = 0.08

-0.9

(-2.6 to 0.8)

p = 0.28

-0.2

(-1.9 to 1.5)

p = 0.79

-3.9

(-8.1 to 0.3)

p = 0.07

-6.4

(-12.5 to -0.4)

p = 0.04*

PNIF (L/min)

-4.7

(-11.7 to 2.3)

p = 0.19

-10.9

(-19.1 to -2.7) p = 0.01*

-6.7

(-16.6 to 3.3)

p = 0.19

-12.6

(-24.9 to -0.4)

p = 0.04*

-1.4

(-11.3 to 8.5)

p = 0.77

-10.7

(-22.3 to 0.8)

p = 0.07

  1. Values are the estimated difference of the foam and spray exposures compared to the water exposure, the 95% confidence interval (in brackets) and the significance (p) derived from the linear mixed model. Statistical significance at a level of p < 0.05 is indicated with a star (*). Results from the self-assessed eye and nose symptoms and measurements of the break up time (BUT) of the tear film in the eyes and the peak nasal inspiratory flow (PNIF) through the nose are also shown