Table 5.

Sensitivity analysis comparing selection criteria and analysis methods used in 2006–2007 and 2006–2011

Significant factors	2006–2007 (154 records)a			2006–2011 (375 records)b			2006–2007 (184 records)c			2006–2007 (154 records)d
	n	β (SE)	P value	n	β (SE)	P value	n	β (SE)	P value	n	β (SE)	P value
Significant in all analyses
Mixed/loaded chemicals	120	−5.25 (1.93)	0.007	346	−3.97 (1.28)	0.002	163	−5.17 (1.65)	0.001	120	−4.47 (1.98)	0.016
Used chemical-resistant boots	130	−11.40 (5.53)	0.041	359	−16.63 (3.83)	<0.001	176	−16.10 (3.72)	<0.001	130	−13.50 (4.82)	0.005
Used locker for PPE	116	−7.58 (2.41)	0.002	354	−3.40 (1.19)	0.004	171	−5.30 (1.65)	0.001	116	−7.63 (2.20)	0.001
Significant in 2006–2007a
Cleaned spray equipment	120	−4.39 (2.04)	0.033	350	−1.47 (1.02)	0.149	165	−3.09 (1.43)	0.031	120	−4.35 (1.85)	0.019
Used full-face respirator (versus half- face respirator)	118	−6.95 (3.23)	0.034	323	−1.78 (2.44)	0.466	153	−0.48 (3.10)	0.878	118	−2.97 (3.68)	0.418
Self-rated health status as poor/fair (versus excellent)	118	−6.40 (2.70)	0.02	341	−0.82 (1.85)	0.655	160	−4.59 (2.36)	0.051	118	−5.22 (2.99)	0.081
Significant in 2006–2011b
Wore an apron (restricted to mixers/ loaders)e	88	−2.97 (2.93)	0.314	274	−4.09 (1.67)	0.014	122	−4.80 (2.27)	0.014	97	−4.45 (3.23)	0.168
Used multiple OP/CBs	119	−2.50 (2.95)	0.399	311	−2.70 (1.35)	0.045	141	−6.00 (1.89)	0.002	119	−4.20 (2.67)	0.116

^aResults from the 2006–2007 analysis published by Hofmann et al. (2010b).

^bResults from the 2006–2011 analysis described in this article.

^cResults from restricting the 2006–2011 analysis to the years 2006–2007.

^dResults from using the Hofmann et al. (2010b) data and analyzing using the mixed effects model described in this article. The individual random effect was removed because there was only one record per individual in this data set.

^eResults reported by Hofmann et al. (2010b) did not restrict analysis to mixers/loaders, so n reported here is different than in the Hofmann et al. (2010b) publication.