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Table 2 Multivariate Poisson regression analyses for the biennially changes in platelets

From: Effects of exposure to low-dose ionizing radiation on changing platelets: a prospective cohort study

Variable

β (95% CI)

P

βa(95% CI)

Pa

All

0.011 (0.006, 0.016)

< 0.001

0.008 (0.003, 0.014)

0.001

Gender

 Male

0.012 (0.006, 0.018)

< 0.001

0.013 (0.007, 0.019)

< 0.001

 Female

− 0.001 (− 0.010, 0.010)

0.955

− 0.002 (− 0.012, 0.008)

0.751

Age at baseline

 < 40 years

0.009 (0.002, 0.015)

0.007

0.004 (− 0.003, 0.010)

0.262

 ≥ 40 years

0.023 (0.014,0.032)

< 0.001

0.020 (0.010, 0.029)

< 0.001

Service at baseline

 < 10 years

0.027 (0.020, 0.033)

< 0.001

0.021 (0.014, 0.027)

< 0.001

 ≥ 10 years

− 0.014 (− 0.023, − 0.006)

0.001

− 0.015 (− 0.024, − 0.007)

< 0.001

Occupation

 Physician

− 0.002 (− 0.008, 0.004)

0.530

− 0.002 (− 0.009, 0.004)

0.497

 Radiation technician

0.047 (0.036, 0.059)

< 0.001

0.045 (0.033, 0.056)

< 0.001

 Nurse

− 0.031 (− 0.048, − 0.015)

< 0.001

− 0.033 (− 0.049, − 0.016)

< 0.001

 Others

0.043 (0.016, 0.069)

0.002

0.037 (0.008, 0.066)

0.012

Medical level

 Primary

0.006 (− 0.007, 0.020)

0.336

0.015 (0.002, 0.029)

0.027

 Secondary

0.017 (0.007, 0.026)

< 0.001

0.019 (0.010, 0.028)

< 0.001

 Third

0.010 (0.003, 0.017)

0.004

0.004 (− 0.003, 0.011)

0.274

Smoking habits

 No

0.007 (0.001, 0.013)

0.020

− 0.001 (− 0.007, 0.005)

0.838

 Yes

0.025 (0.015, 0.035)

< 0.001

0.037 (0.026, 0.047)

< 0.001

  1. aEstimate based on Poisson regression model, adjusted for gender, age at baseline, service at baseline, occupation, medical level, and smoking habits