Objective To analyze the risk factors of neck pain in fighter pilots . Methods Cluster random sampled fighter pilots were investigated by a cross-sectional survey .The questionnaire included daily neck pain ,as well as such exposure factors as personal general conditions ,life styles and flight traing styles .The subjects with daily neck pain were constituted to the neck pain group and those without daily neck pain were selected as the control group .The differences in age ,body mass index ,lifestyle and training styles were compared between two groups .Then the risk factors were analyzed by a Logistic regression model . Results Data of 429 fighter pilots were validated and were analyzed .The prevalence of daily neck pain was 30 .1% .The differences on the proportions of age over 35 yr ,sleep disorders ,improper measures against annoyance ,sedentary habit ,more than 4 hours of consumer electronics watching per day ,more than 2 hours of sustained monitor watching frequently , mattress too hard , long-term flight , vibration influence in flight , insufficient protection measures against +Gzload ,and no massage relaxation after flight showed statistically significance between two groups (χ2＝5 .662～32 .128 , P＜0 .05) .Totally 6 latent risk factors of neck pain were concerned by Logistic regression model .The descending risk orders of the factors were the age over 35 yr (OR＝11 .397) ,sleep disorders (OR ＝ 3 .013 ) , improper measures against annoyance (OR ＝ 2 .758 ) , awkward neck posture during flight (OR＝2 .618) ,watching consumer electronics more than 4 hours per day (OR＝2 .192) and continuously watching monitor more than 2 hours frequently (OR＝1 .899) . Conclusions The prevalence of daily neck pain in fighter pilots was comparatively high .Life styles effectively influence the invasion of neck pain in fighter pilots according to the study .Insufficient work and rest alternation and unreasonable emotion regulation would be the important risk factors to the daily neck pain in fighter pilots .

Objective To investigate and analyze the prevalence of dry eye syndrome and risk factors in military pilots in order to provide references for improving aeromedical supports . Methods Cross-sectional study was applied on conducting questionnaire survey as consensus obtained from 846 military pilots .The suspected dry eye syndrome cases were diagnosed by the tests of slit lamp ,break-up time (BUT) ,Schirmer I test (SIT) ,corneal fluorescein staining (FL) and tarsal glands function . The pilots were grouped by aircraft type (fighter ,helicopter ,transporter and bomber) ,by flying hours (＜1 000 h ,1 000-2 000 h ,＞2 000 h) ,by if the long-term usage of antibiotic eye drops and by if the play time of computer or smart phone ≥ 4 h/d .The prevalence of dry eye syndrome was compared among groups . Results Eight hundred and forty-three valid questionnaires out of 846 were collected .The available ratio was 99 .65% .The prevalence of the dry eye syndrome was 8 .07% . The common self-repoiled symptoms were dryness (80 .88% ) ,foreign body sensation (41 .18% ) , visual fatigue (36 .76% ) ,visual acuity fluctuation (22 .06% ) and red eyes (14 .71% ) .The comparisons among different aircraft type groups showed no statistical significance (χ2＝ 3 .16 , P＞ 0 .05) .The comparisons among different flying hours groups were statistically significant (χ2＝49 .85 ,P＜0 .01) . The prevalence of dry eye syndrome in ＞2 000 h flying hours group was much higher than that in other two flying hours groups .The pilots with antibiotic eye drops for long time had significantly higher prevalence than those without the long-term usage (χ2＝ 20 .68 , P＜ 0 .01) .The pilots using computer or smart phone longer than 4 h/d showed significantly higher prevalence (χ2＝18 .33 , P＜0 .01) . Conclusions The prevalence of dry eye syndrome in military pilots increases with flying hours .Eye dryness is the main symptom .Using computer or smart phone for long time is one of the major risk factors that could lead to the dry eye syndrome in military pilots .

Objective To analyze the risk factors of neck pain in fighter pilots . Methods Cluster random sampled fighter pilots were investigated by a cross-sectional survey .The questionnaire included daily neck pain ,as well as such exposure factors as personal general conditions ,life styles and flight traing styles .The subjects with daily neck pain were constituted to the neck pain group and those without daily neck pain were selected as the control group .The differences in age ,body mass index ,lifestyle and training styles were compared between two groups .Then the risk factors were analyzed by a Logistic regression model . Results Data of 429 fighter pilots were validated and were analyzed .The prevalence of daily neck pain was 30 .1% .The differences on the proportions of age over 35 yr ,sleep disorders ,improper measures against annoyance ,sedentary habit ,more than 4 hours of consumer electronics watching per day ,more than 2 hours of sustained monitor watching frequently , mattress too hard , long-term flight , vibration influence in flight , insufficient protection measures against +Gzload ,and no massage relaxation after flight showed statistically significance between two groups (χ2＝5 .662～32 .128 , P＜0 .05) .Totally 6 latent risk factors of neck pain were concerned by Logistic regression model .The descending risk orders of the factors were the age over 35 yr (OR＝11 .397) ,sleep disorders (OR ＝ 3 .013 ) , improper measures against annoyance (OR ＝ 2 .758 ) , awkward neck posture during flight (OR＝2 .618) ,watching consumer electronics more than 4 hours per day (OR＝2 .192) and continuously watching monitor more than 2 hours frequently (OR＝1 .899) . Conclusions The prevalence of daily neck pain in fighter pilots was comparatively high .Life styles effectively influence the invasion of neck pain in fighter pilots according to the study .Insufficient work and rest alternation and unreasonable emotion regulation would be the important risk factors to the daily neck pain in fighter pilots .

Objective To investigate and analyze the prevalence of dry eye syndrome and risk factors in military pilots in order to provide references for improving aeromedical supports . Methods Cross-sectional study was applied on conducting questionnaire survey as consensus obtained from 846 military pilots .The suspected dry eye syndrome cases were diagnosed by the tests of slit lamp ,break-up time (BUT) ,Schirmer I test (SIT) ,corneal fluorescein staining (FL) and tarsal glands function . The pilots were grouped by aircraft type (fighter ,helicopter ,transporter and bomber) ,by flying hours (＜1 000 h ,1 000-2 000 h ,＞2 000 h) ,by if the long-term usage of antibiotic eye drops and by if the play time of computer or smart phone ≥ 4 h/d .The prevalence of dry eye syndrome was compared among groups . Results Eight hundred and forty-three valid questionnaires out of 846 were collected .The available ratio was 99 .65% .The prevalence of the dry eye syndrome was 8 .07% . The common self-repoiled symptoms were dryness (80 .88% ) ,foreign body sensation (41 .18% ) , visual fatigue (36 .76% ) ,visual acuity fluctuation (22 .06% ) and red eyes (14 .71% ) .The comparisons among different aircraft type groups showed no statistical significance (χ2＝ 3 .16 , P＞ 0 .05) .The comparisons among different flying hours groups were statistically significant (χ2＝49 .85 ,P＜0 .01) . The prevalence of dry eye syndrome in ＞2 000 h flying hours group was much higher than that in other two flying hours groups .The pilots with antibiotic eye drops for long time had significantly higher prevalence than those without the long-term usage (χ2＝ 20 .68 , P＜ 0 .01) .The pilots using computer or smart phone longer than 4 h/d showed significantly higher prevalence (χ2＝18 .33 , P＜0 .01) . Conclusions The prevalence of dry eye syndrome in military pilots increases with flying hours .Eye dryness is the main symptom .Using computer or smart phone for long time is one of the major risk factors that could lead to the dry eye syndrome in military pilots .

Object To develop a resonance scattering spectral(RSS) method for the determination of total flavone in Shuxuening Tablet, and study the cause of RSS enhancement. Methods The BSA Mo (Ⅵ) qucercetin (Qu) system was investigated by RSS method. Results There were two resonance sacttering peaks at 470 and 525 nm. The Qu concentration in the range of 0-2 4 mg/L is linear to the resonance scattering intensity I 470 nm , with a detection limit of 0 3 mg/L. Conclusion This method is simple, sensitive and suitable for the determination of total flavone in Shuxuening Tablet. The spectral results demonstrate that the formation of [BSA Mo Qu] n associated particle and the interface between the particle solid phase and water phase results to its enhanced RSS.