TABLE 3—
Descriptive Statistics of Study Sample by Treatment: United States, 2007–2011
| Experimental Group, No. (%) or Mean ±SD |
Control Group, No. (%) or Mean ±SD |
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| Variable | 2007 (n = 287) | 2008 (n = 310) | 2009 (n = 264) | 2010 (n = 259) | 2011 (n = 223) | 2007 (n = 196) | 2008 (n = 236) | 2009 (n = 286) | 2010 (n = 319) | 2011 (n = 277) |
| Gender | ||||||||||
| Male | 90 (31.4) | 76 (24.5) | 68 (25.8) | 64 (24.7) | 56 (25.1) | 40 (20.4) | 59 (25.0) | 59 (20.6) | 68 (21.3) | 57 (20.6) |
| Female | 197 (68.6) | 234 (75.5) | 196 (74.2) | 195 (75.3) | 167 (74.9) | 156 (79.6) | 177 (75.0) | 227 (79.4) | 251 (78.7) | 220 (79.4) |
| Employment status | ||||||||||
| Full time | 130 (45.3) | 124 (40.0) | 105 (39.8) | 107 (41.3) | 78 (35.0) | 60 (30.6) | 81 (34.3) | 98 (34.3) | 100 (31.4) | 69 (24.9) |
| Part time | 34 (11.9) | 47 (15.2) | 29 (11.0) | 25 (9.7) | 23 (10.3) | 13 (6.6) | 21 (8.9) | 36 (12.6) | 33 (10.3) | 29 (10.5) |
| Not employed | 123 (42.8) | 139 (44.8) | 130 (49.2) | 127 (49.0) | 122 (54.7) | 123 (62.8) | 134 (56.8) | 152 (53.2) | 186 (58.3) | 179 (64.6) |
| Educational level | ||||||||||
| Did not graduate from high school | 19 (6.6) | 20 (6.5) | 19 (7.2) | 14 (5.5) | 8 (3.6) | 30 (15.3) | 27 (11.5) | 22 (7.7) | 41 (12.9) | 26 (9.4) |
| Graduated from high school | 86 (30.0) | 73 (23.5) | 63 (23.9) | 76 (29.3) | 52 (23.3) | 58 (29.6) | 65 (27.5) | 64 (22.4) | 77 (24.1) | 65 (23.5) |
| Attended college or technical school | 71 (24.7) | 82 (26.5) | 68 (25.7) | 70 (27.0) | 80 (35.9) | 49 (25.0) | 68 (28.8) | 80 (28.0) | 95 (29.8) | 89 (32.1) |
| Graduated from college or technical school | 111 (38.7) | 135 (43.5) | 114 (43.2) | 99 (38.2) | 83 (37.2) | 59 (30.0) | 76 (32.2) | 120 (41.9) | 106 (33.2) | 97 (35.0) |
| Molds in the home | ||||||||||
| No | 244 (85.0) | 271 (87.4) | 224 (84.9) | 221 (85.3) | 199 (89.2) | 168 (85.7) | 215 (91.1) | 260 (90.9) | 275 (86.2) | 248 (89.5) |
| Yes | 43 (15.0) | 39 (12.6) | 40 (15.2) | 38 (14.7) | 24 (10.8) | 28 (14.3) | 21 (8.9) | 26 (9.1) | 44 (13.8) | 29 (10.5) |
| Pets or domestic animals in the home | ||||||||||
| No | 124 (43.5) | 148 (47.7) | 131 (49.6) | 130 (50.2) | 107 (48.0) | 95 (48.5) | 121 (51.3) | 126 (44.1) | 134 (42.0) | 115 (41.5) |
| Yes | 162 (56.5) | 162 (52.3) | 133 (50.4) | 129 (49.8) | 116 (52.0) | 101 (51.5) | 115 (48.7) | 160 (55.9) | 185 (58.0) | 162 (58.5) |
| Use of indoor combustion devices | ||||||||||
| No | 269 (93.7) | 297 (95.8) | 248 (93.9) | 242 (93.4) | 212 (95.1) | 175 (89.3) | 215 (91.1) | 256 (89.5) | 297 (93.1) | 259 (93.5) |
| Yes | 18 (6.3) | 13 (4.2) | 16 (6.1) | 17 (6.6) | 11 (4.9) | 21 (10.7) | 21 (8.9) | 30 (10.5) | 22 (6.9) | 18 (6.5) |
| Secondhand smoke exposure | 13.13 ±0.58 | 10.76 ±0.40 | 10.72 ±0.37 | 11.41 ±0.43 | 11.04 ±0.66 | 12.26 ±2.24 | 9.97 ±0.95 | 9.87 ±0.92 | 9.85 ±1.32 | 10.22 ±0.44 |
| Current asthma | ||||||||||
| No | 107 (37.3) | 119 (38.4) | 124 (47.0) | 109 (42.0) | 93 (41.7) | 68 (34.7) | 92 (39.0) | 103 (36.0) | 113 (35.4) | 97 (35.0) |
| Yes | 180 (62.7) | 191 (61.6) | 140 (53.0) | 150 (58.0) | 130 (58.3) | 128 (65.3) | 144 (61.0) | 183 (64.0) | 206 (64.6) | 180 (65.0) |
| No. of doctor visits | 1.25 ±2.64 | 1.32 ±2.28 | 1.02 ±1.50 | 1.48 ±3.73 | 1.04 ±2.09 | 1.69 ±2.92 | 1.22 ±2.37 | 1.61 ±3.97 | 1.22 ±2.30 | 1.27 ±1.82 |