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Table 2 Infants' cotinine creatinine ratios (microgram/mmol) in urine during the period of 7 days

From: A descriptive analysis of relations between parents' self-reported smoking behavior and infants' daily exposure to environmental tobacco smoke

Subject no. Sex Age (month) Cotinine creatinine ratio (microgram/mmol) in infants' urine Indoor - outdoor smoking No. of smokers in home
    mon tue wed thu fri sat sun mean sd   
1 F 2 165,93 664,62 570,83 937,50 290,00 470,67 489,23 512,68 251,36 indoor 2
2 F 3 20,41 20,83 22,34 38,46 22,73 * 17,86 23,77 7,40 outdoor 2
3 F 4 * * * * * * * - - outdoor 1
4 F 6 11,64 20,37 22,05 14,04 14,77 12,30 18,57 16,25 4,08 outdoor 2
5 F 6 5,71 6,17 16,95 13,51 10,99 13,33 8,26 10,71 4,19 outdoor 1
6 M 6 8,95 6,91 8,70 5,45 - - - 7,50 1,64 outdoor 1
7 F 7 42,15 87,80 42,86 * * 80,88 175,74 85,89 54,47 outdoor 1
8 M 8 32,70 44,35 36,59 23,28 26,44 29,68 25,66 31,24 7,33 indoor 2
9 F 8 39,76 41,57 32,63 29,89 112,17 77,33 157,14 70,07 48,57 indoor 2
10 M 8 16,67 10,05 13,41 17,81 18,98 * * 15,38 3,63 indoor 2
11 F 11 33,33 24,20 80,41 * 26,53 * 31,06 39,11 23,37 indoor 2
12 M 11 8,10 13,21 22,18 25,40 125,00 20,33 6,08 31,47 41,87 indoor 1
13 F 12 18,52 32,31 32,66 85,29 40,22 8,22 200,00 59,60 66,51 indoor 2
14 M 13 1,31 3,48 5,62 2,62 2,13 1,98 3,52 2,95 1,42 outdoor 1
15 M 18 2,94 5,00 3,50 2,82 22,73 2,26 3,83 6,15 7,36 outdoor 1
16 F 20 65,86 74,55 18,87 40,23 41,11 87,80 96,30 60,67 28,20 indoor 1
17 M 20 * * 3,68 * * 3,08 *. 3,38 0,43 outdoor 1
18 M 23 12,94 11,98 12,89 20,00 16,60 42,36 17,41 19,17 10,63 indoor 1
19 M 26 4,95 2,53 3,30 1,92 24,39 3,38 3,45 6,27 8,04 outdoor 2
20 F 26 23,61 20,38 27,21 * * * * 23,73 3,41 indoor 1
21 F 27 8,17 3,70 15,15 6,02 16,65 5,84 7,90 9,06 4,92 outdoor 2
22 F 29 5,88 2,01 2,89 2,77 10,10 2,24 4,39 4,32 2,89 outdoor 2
23 M 30 6,67 6,27 4,60 4,81 10,96 13,05 11,67 8,29 3,50 outdoor 2
24 F 32 27,04 43,35 26,49 - 31,72 31,15 38,02 32,96 6,56 indoor 1
25 M 33 14,85 8,96 7,54 - 24,79 13,76 * 13,98 6,79 indoor 1
26 M 35 * 20,88 15,38 18,12 37,14 46,23 40,00 29,63 13,05 indoor 2
27 M 38 17,23 18,99 19,50 15,06 13,12 15,64 14,18 16,25 2,41 indoor 2
28 M 43 21,64 28,25 26,12 22,99 18,05 34,06 36,23 26,76 6,61 indoor 2
Mean
(SD)
24.68 (33.01) 47.03 (127.79) 40.53 (107.23) 63.24 (201.21) 41.62 (61.71) 46.16 (98.39) 63.93 (111.65) 43.23 (96.27)    
  1. Notes: - = no material; * = too little material to analyse urine.