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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)