Journal of Occupational Medicine and Toxicology

Table 1 Characteristics of 30 shooting instructors occupationally exposed to UFPs for 4.7 years on average and 30 control participants

From: Occupational exposure to ultrafine particles in police officers: no evidence for adverse respiratory effects

	Exposed to UFPs	Controls	p-value (t-test)
Age, years (mean)	34.1 ± 8.0	41.9 ± 5.1	< 0.0001
Current smokers %	29	34	0.65^b
Ex-smokers %	29	31	0.87^b
Years	6.83 range (0–25)	13.17 range (0–36)	0.02^a
Pack-years	5.53 range (0–30)	14.47 range (0–60)	0.01^a
Body height in cm	179.3 ± 5.5	181.6 ± 7.3	0.18
Body weight in kg	80.5 ± 11.2	84.5 ± 13.2	0.08
Systolic BP in mmHg	128.0 ± 14.1	128.0 ± 14.9	0.83
Diastolic BP in mmHg	82.3 ± 10.6	82.8 ± 10.1	0.71
VC (L)	5.01 ± 0.93	5.45 ± 0.97	0.0165
FVC %	95.6 ± 15.6	90.1 ± 13.4
FEV₁%	96.8 ± 13.2	92.8 ± 17.0
MEF₅₀ (%)	94.7 ± 25.7	90.0 ± 32.0
MEF₂₅ (%)	85.7 ± 34.8	72.3 ± 36.8

Data expressed in mean ± standard deviation
BP blood pressure, VC vital capacity, FEV₁ forced expiratory volume in one second, MEF₅₀ maximum expiratory flow at 50% of forced VC, MEF₂₅ maximum expiratory flow at 25% of forced VC
^aWilcoxon test
^bChiSquare test

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ISSN: 1745-6673

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