Table 6.
Descriptive statistics and correlations between predictor and criterion variables
| Variable | M (SD) | No. (%) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Age at menarche | 12.54 (1.42) | - | |||||||
| 2 | Irregular menstruation | 115 (12.9) | −0.06 | - | ||||||
| 3 | Heavy flow | 295 (33.1) | −0.07* | −0.07* | - | |||||
| 4 | Pain catastrophizing | 16.78 (11.72) | −0.14*** | −0.08* | 0.20*** | - | ||||
| 5 | Pain intensity (on average) | 5.51 (1.80) | −0.11** | 0.03 | 0.28*** | 0.45*** | - | |||
| 6 | Pain intensity (most severe) | 7.47 (1.73) | −0.14*** | 0.01 | 0.22*** | 0.44*** | 0.75*** | - | ||
| 7 | Pain interference | 24.93 (8.01) | −0.11** | −0.05 | 0.27*** | 0.62*** | 0.57*** | 0.54*** | - | |
Variables 2 and 3 were coded as binary variables, whereby 0 = regular menstruation, 1 = irregular menstruation and 0 = light/normal flow, 1 = heavy flow, - = to signify the negative correlation between two variables, respectively.
*
P < 0.05.
**
P < 0.01.
***
P < 0.001.