Table 2 Percentage of habitual daytime napping by different characteristics
Characteristics | Participants | Habitual daytime napping | x2 | P | |
|---|---|---|---|---|---|
n | Percentage (95% CI) | Â | Â | ||
Age range (years) |  |  |  | 89.61 | < 0.0001 |
 30–49 | 23,099 | 1036 | 4.49 (4.22–4.75) |  |  |
 50–59 | 18,516 | 857 | 4.63 (4.33–4.93) |  |  |
 60–79 | 12,301 | 864 | 7.02 (6.57–7.48) |  |  |
Sex |  |  |  | 339.20 | < 0.0001 |
 Males | 22,573 | 1619 | 7.17 (6.89–7.45) |  |  |
 Females | 31,343 | 1138 | 3.63 (3.46–3.80) |  |  |