Studies focused on stress and depression in nurses found that the nurses’ tension was positively correlated to their depression levels (Chiang and Chang, 2012, Lee and Kim, 2006 and Tang et al., 2005). Lin et al. (2010) reported similar findings (r = .61, P < .001) in psychiatric nurses. Another prior study suggested that work stress was a significant predictor of depression ( Tseng, 2004). Thus, higher work stress appears to result in a higher incidence rate and level of depression.