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Table 3 Associations of daily outpatient visits by age, sex and season with ambient CO

From: Carbon monoxide and risk of outpatient visits due to cause-specific diseases: a time-series study in Yichang, China

Subgroups Total visits RED visits CVD visits GUD visits GID visits NPD visits
Overall patientsa 24.67(14.48,34.85) 21.79(12.24,31.35) 39.30(25.67,52.92) 25.83(13.91,37.74) 19.04(8.39,29.68) 10.84(−0.22,21.90)
Gender
 Male 23.39(13.40,33.38) 22.31(12.44,32.18) 38.21(24.18,52.24) 22.85(9.43,36.27) 19.25(8.37,30.13) 11.35(−0.28,22.99)
 Female 25.58(15.10,36.06) 21.24(11.58,30.90) 40.54(26.85,54.22) 26.55(14.22,38.89) 18.85(7.63,30.07) 10.41(−1.27,22.10)
Age (year)
 0~5 19.67(9.67,29.68) 21.74(11.46,32.02) 20.26(−4.73,45.25) 35.68(6.02,65.35) 11.87(−1.37,25.12) 7.86(−26.61,42.32)
 6~64 24.00(13.52,34.48) 21.48(11.16,31.81) 36.18(23.34,49.03) 26.18(14.04,38.32) 17.90(6.68,29.12) 9.51(−1.71,20.72)
 65~ 30.78(18.43,43.14) 23.61(11.58,35.64) 42.99(27.38,58.60) 20.96(6.02,35.91) 29.54(17.03,42.06) 15.00(1.18,28.81)
Season
 Warm 41.09(22.04,60.15)* 27.83(7.92,47.74) 68.04(40.48,95.61)* 22.79(−0.72,46.29) 21.98(0.32,43.64) 25.80(8.14,43.46)*
 Cool 16.13(2.52,29.74)* 11.61(−0.62,23.85) 38.57(20.14,56.99)* 14.08(−1.42,29.58) 9.73(−4.19,23.64) −4.18(−20.27,11.91)*
  1. Abbreviation: RED respiratory diseases, CVD cardiovascular diseases, GUD genitourinary diseases, GID gastrointestinal diseases, NPD neuropsychiatric diseases
  2. Note: Results was estimated percent increases and its corresponding 95% confidence intervals with 1 mg/m3 increase in CO at lag06 (lag06 was concentration computed as the means of the same and previous 6 days);
  3. aOverall patients means all of the patients in different outpatient categories; The statistically significant estimates are highlighted in bold
  4. *Statistically significant for between-group difference (P < 0.05)