. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: J Occup Environ Med. 2016 Mar;58(3):227–231. doi: 10.1097/JOM.0000000000000661

Table 4.

Linear regression coefficients (b1) of main effect of Cumulative Exposure Index (mg/m³-workyears) on acceleration capacity (msec) and deceleration capacity(msec) for 40 participants without heart disease.

Parameter	^aAcceleration Capacity(AC) Beta CEI (95% C.I.)	Deceleration Capacity(DC) Beta CEI (95% C. I.)

Models
Model 1	0.48 (−0.02, 0.97)	^*−0.44 (−0.86, −0.01)
Model 2	^*1.00 (0.11, 1.88)	−0.70 (−1.47, 0.09)
Model 3	^*0.94 (0.03, 1.85)	−0.66 (−1.46, 0.14)
Model 4	0.93 (−0.02, 1.88)	−0.63 (−1.47, 0.21)

Acceleration Capacity is measured on a negative scale, therefore positive estimates connote a decrease in AC on a negative scale.

indicate significant associations (p<0.05)

Model 1(crude), Model 2(age-adjusted), Model 3 (adjusted for age and time of day), Model 4 (adjusted for age, time of day and last weld day)

CEI=Cumulative Exposure Index (mg/m³-workyears)

Age=The residual of age on CEI was used to represent the heart age (variation in age not explained by the exposure) (years)

TOD=Time of Day ECG was taken (AM vs PM)

LWD=Last Weld Day (acute effects)