Fig. 5
Body weight and relative change in body weight (%) comparing HF and regular diets for the Sprague Dawley and Brown Norway strains during the 24-wk study period. Starting wk. 7 during diet maintenance, groups of rats from each strain were exposed to GMA-SS welding fume (20 mg/m3 × 3 h/d × 4 d/wk. × 5 wk) or filtered air (control) until wk. 12 at which time animals from each strain were euthanized. A separate set of rats from each strain were allowed to recover from welding fume exposure until the end of the 24-wk period. Values are means + standard error (n = 12–24/group). See text for p values