Objective To analyze the cunent situation and latent profiles of nurses'perceived organizational support,and explore the influencing factors of different types.Methods Through convenience sampling,a total of 1,860 nurses from the Pearl River Delta,Northern Guangdong,Eastern Guangdong and Western Guangdong regions of Guangdong Province were selected for the survey between October and December 2023.The demographic questionnaire,the Perceived Organizational Support Scale,and the Psychological Resilience Scale were used for investigation.The latent profiles of the nurses'perceived organizational support,the influencing factors of latent profiles were identified by single-factor analysis and multivariate Logistic regression.Results The score of the items of the perceived organizational support in l,819 nurses is(3.47±0.88)scores.Nurses perceived organizational support is divided into 3 latent classes,namely"poor group"(10.1％),"balanced group"(44.4％),and"rich group"(45.5％).The influencing factors include recruitment type,hospital level,and psychological resilience(all P＜0.05).Conclusion The perceived organizational support among nurses is moderately high and heterogeneous,which could be divided into 3 latent profiles.Nursing managers should focus on nurses from the poor group and balanced group and intervene with nurses according to the influencing factors of the different latent profiles to improve the level of nurses perceived organizational support.

Objective To analyze the cunent situation and latent profiles of nurses'perceived organizational support,and explore the influencing factors of different types.Methods Through convenience sampling,a total of 1,860 nurses from the Pearl River Delta,Northern Guangdong,Eastern Guangdong and Western Guangdong regions of Guangdong Province were selected for the survey between October and December 2023.The demographic questionnaire,the Perceived Organizational Support Scale,and the Psychological Resilience Scale were used for investigation.The latent profiles of the nurses'perceived organizational support,the influencing factors of latent profiles were identified by single-factor analysis and multivariate Logistic regression.Results The score of the items of the perceived organizational support in l,819 nurses is(3.47±0.88)scores.Nurses perceived organizational support is divided into 3 latent classes,namely"poor group"(10.1％),"balanced group"(44.4％),and"rich group"(45.5％).The influencing factors include recruitment type,hospital level,and psychological resilience(all P＜0.05).Conclusion The perceived organizational support among nurses is moderately high and heterogeneous,which could be divided into 3 latent profiles.Nursing managers should focus on nurses from the poor group and balanced group and intervene with nurses according to the influencing factors of the different latent profiles to improve the level of nurses perceived organizational support.

Objective To establish the reference intervals of 20 dry biochemical items in different age periods among healthy population in Chengdu to providing better support and service for clinical diagnosis and treatment .Methods The stratified random‐ized cluster method was used to collect healthy children and adults in 4 age periods(1 month-3 years old ,>3-7 years old ,>7-18 years old and >18 years old) .Totally 1 495 healthy people (740 males and 755 female) were screened out as the research sub‐jects by the questionnaire ,physical examination and laboratory screening .Fasting venous blood samples were collected from these cases ,then the VITROS 5600 dry biochemistry analyzer was used to detect 20 biochemical items .The obtained results were statisti‐cally analyzed .Results In different groups according to sex and age ,except the conjugated bilirubin (BC) was constant 0 μmol/L , the other items had statistical differences (P<0 .05) .After merging the different groups without statistically significant difference , the obtained reference intervals had significant differences compared with the reference intervals provided by the manufacturer .Con‐clusion Laboratory should establish the different reference intervals aiming at different age and gender populations according to the special character of hospital visiting populations in order to meet the clinical requirements .