| 1981–1995 | Chi-square test | 1996–2009 | Chi-square test | ||
---|---|---|---|---|---|---|
 | Early | Late |  | Early | Late |  |
 | N | N |  | N | N |  |
OCC men | Â | Â | Â | Â | Â | Â |
 q1-3 (N = 970) | 263 (48.5 %) | 279 (51.5 %) | 0.01** | 213 (49.8 %) | 215 (50.2 %) | 0.001** |
 q4-5 (N = 1075) | 250 (41.5 %) | 352 (58.5 %) |  | 181 (38.3 %) | 292 (61.7 %) |  |
OCC women | Â | Â | Â | Â | Â | Â |
 q1-3 (N = 624) | 144 (49.5 %) | 147 (50.5 %) | 0.74 | 194 (58.3 %) | 139 (41.7 %) | 0.002** |
 q4-5 (N = 589) | 143 (48.1 %) | 154 (51.9 %) |  | 134 (45.9 %) | 158 (54.1 %) |  |
OPC men | ||||||
 q1-3 (N = 733) | 47 (22.8 %) | 159 (77.2 %) | 0.19 | 61 (11.6 %) | 466 (88.4 %) | 0.67 |
 q4-5 (N = 723) | 43 (17.8 %) | 198 (82.2 %) | 60 (12.4 %) | 422 (87.6 %) | ||
OPC women | ||||||
 q1-3 (N = 256) | 28 (28.6 %) | 70 (71.4 %) | 0.61 | 41 (25.9 %) | 117 (74.1 %) | 0.09 |
 q4-5 (N = 260) | 27 (25.5 %) | 79 (74.5 %) | 28 (18.2 %) | 126 (81.8 %) |