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{L-End}Objective To analyze sound pressure level and spectrum characteristics of noise from various equipment in noise-related worksites in wooden furniture enterprises in Zhongshan City. {L-End}Methods A total of 107 wooden furniture enterprises with equipment sound pressure levels ≥85.0 dB(A) were selected as the research subjects using the judgment sampling method. Individual noise meters were used to detect the sound level and spectrum of equipment in noise-related worksites. Cluster analysis was used to analyze the noise spectrum characteristics of each noise equipment. {L-End}Results The incidence of sound pressure level exceeding the national standard of occupational exposure limits for noise in workplace among the research subjects was 60.4% (365/604). The equipment with the highest sound pressure level was the sliding table saw (rough shape cutting position) at 101.4 dB(A), while the lowest was the sanding machine (grinding position) at 85.0 dB(A). The clustering analysis results showed that the noise spectrum characteristics of nail guns, sliding table saw, edge banders, spray guns, and drilling machines were similar, with the highest sound pressure level of 4 000.0 Hz, mainly concentrating in the high-frequency. The noise spectrum characteristics of punching machines, sanding machine, lathes, and engraving machines were similar, with the highest sound pressure level ranging from 500.0 to 1 000.0 Hz, mainly concentrating in the mid-frequency. The noise spectrum characteristics of drilling machines, planers, hot press machines, and mortise and tenon machines were similar, with the highest sound pressure level ranging from 500.0 to 1 000.0 Hz, mainly concentrating in the mid- and high-frequency. The sound pressure level of the mixer reached its peak at 8 000.0 Hz, demonstrating a wide frequency domain characteristic of sound pressure level with the presence of low-, mid- and high-frequencies. {L-End}Conclusion The noise-exposed hazards of wooden furniture enterprises are relatively serious, and the spectral characteristics of the equipment with noise are distinct. It is recommended to implement targeted noise reduction measures and personal hearing protection based on the specific spectrum characteristics of equipment noise.
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Objective:To explore the effects of problem-solving therapy on breastfeeding self-efficacy and psychological status among primiparas, to provide basis for improving the breastfeeding of primipara.Methods:A total of 102 primiparas were divided into experimental group and control group by random number table method, each group contained 51 cases. Finally, 47 cases in the experimental group and 49 cases in the control group completed the study. The control group received routine nursing, while primiparas in the experimental group carried out problem-solving therapy. Before and after 6-week intervention, the effects was assessed by Breastfeeding Self-Efficacy Scale (BSES), Edinburgh Postnatal Depression Scale (EPDS) and General Well-being Schedule (GWB), respectively.Results:After intervention, the scores of primapara feedig cognition, feeding feeling, feeding skills and BSES total scores were (21.13±2.97) points, (65.47±6.63) points, (31.94±2.59) points, (118.53±8.47) points in the experimental group, significantly higher than (19.43±3.28) points, (61.76±5.20) points, (30.53±2.01) points, (111.71±6.11) points in the control group ( t values were 2.658-4.507, P<0.01); the scores of EPDS were (6.04±1.49) points in the experimental group, significantly lower than (6.92±2.08) points in the control group; the scores of life satisfaction and interest, depression and pleasure, energy, relaxation and tension in General Well-Being (GWB) and total scores were (7.51±1.71) points, (20.19±2.47) points, (21.68±2.32) points, (17.06±2.74) points, (90.45±4.96) points in the experimental group, significanlty higher than (6.41±1.82) points, (18.71±2.98) points, (20.57±1.87) points, (15.78±1.79) points, (84.61±5.26) points in the control group, the difference was statistically significant ( t values were 2.380-5.587, P<0.05 or 0.01). Conclusion:Problem-solving therapy can improve breastfeeding self-efficacy and alleviate postnatal depression as well as enhance subjective well-being of primipara women.
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Objective To test the reliability and validity of the Chinese version of the Pregnancy Exercise Self-Efficacy Scale(P-ESES) among Chinese population. Methods The Chinese version of P-ESES was translated from the original one,back-translated and adjusted for cultural adaptation. The reliability and validity were tested among 274 eligible pregnant women recruited in one obstetric outpatient clinic from a tertiary hospital in Guangzhou using convenience sampling. Results The content validity index (CVI) of the Chinese version of P-ESES was 0.98. Factor analysis extracted three common factors,which explained 60.649% of the total variance,and each item had high fac-tor loading quantity(>0.4). The test-retest reliability was 0.531,and Cronbach's α coefficient was 0.804. Conclusion The Chinese version of the P-ESES has been proved to be reliable and valid. It is a valuable tool for evaluating exercise self-efficacy among pregnant women in mainland China.
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Objective To investigate the relationships between exercise and exercise self-efficacy and knowledge in pregnant women. Methods A total of 274 pregnant women were recruited from a tertiary level first class hospital from July to November 2015 in Guangzhou by convenience sampling method. They were investigated with the social relational scale, the Pregnancy Physical Activity Questionaire, the Pregnancy Exercise Self-efficacy Scale, the Pregnancy Exercise knowledge Scale. Results Only 22.6％ (62/274) of the women met the international guideline for exercise. Score of the exercise self-efficacy and exercise were positively correlated(r=0.203, P=0.000). Score of the knowledge and exercise were positively correlated(r=0.103, P=0.032). Score of the exercise self-efficacy and knowledge were meaningless(r=0.098, P=0.106). Conclusions It is suggested to take more actions to enhance the recognition of pregnant women for exercise. Conviction formed after thinking knowledge gradually, by faith again dominate action, ultimately promote the perinatal health of pregnant women.
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Objective To explore the effect of psychological stress and salivary cortisol on the pregnancy outcome of pregnant women with preterm birth. Methods From January to September 2016, the convenience sampling method was adopted to select 138 pregnant woman with preterm preterm delivery of preterm preterm births in a class of grade 3 obstetrics and gynecology specialized hospitals. Among them, there were 86 pregnant women with preterm birth and 52 with full-term birth. The perceived stress scale ( PSS) combined with saliva cortisol testing to assess subjective and objective psychological stress of pregnant women, using multiple linear regression analysis the relationship of psychological pressure,salivary cortisol and preterm birth. Results The PSS score of 138 prenant woman was 21.5±8.1 with middle-high level. The PSS score of 86 pregnant women with preterm birth were higher those of 52 with full-term birth. The salivary cortisol levels of 8:00am, 16:00pm and 23:00pm in 86 pregnant women with preterm birth were respectively significantly higher than those of 52 with full-term birth (P<0.001). Multiple linear regression analysis showed that high PSS score and short pregnant weeks with preterm birth were also risk factors for premature birth (all P<0.05). Conclusions High levels of psychological stress and short pregnant weeks are risk factors for premature birth. Health care workers can reduce the incidence of preterm labor by improving the mental state of pregnant women.