. 2016 Apr 8;9:195–205. doi: 10.2147/JPR.S102379

Table 3.

Bivariate correlation matrix between pain intensity and size ratings for temporal summation trials for older adults

	1	2	3	4	5	6	7	8	9	10	11	12
1. Pulse 1 intensity rating, 2.5-second IPI trial	1.00
2. Pulse 5 intensity rating, 2.5-second IPI trial	0.71^*	1.00
3. Pulse 10 intensity rating, 2.5-second IPI trial	0.27	0.55^*	1.00
4. Pulse 1 intensity rating, 3.5-second IPI trial	0.67^*	0.49^*	0.16	1.00
5. Pulse 5 intensity rating, 3.5-second IPI trial	0.58^*	0.67^*	0.63^*	0.56^*	1.00
6. Pulse 10 intensity rating, 3.5-second IPI trial	0.32	0.43^*	0.88^*	0.29	0.79^*	1.00
7. Pulse 1 size rating, 2.5-second IPI trial	0.55^*	0.40	0.13	0.68^*	0.58^*	0.27	1.00
8. Pulse 5 size rating, 2.5-second IPI trial	0.60^*	0.48^*	0.37	0.59^*	0.69^*	0.52^*	0.80^*	1.00
9. Pulse 10 size rating, 2.5-second IPI trial	0.44	0.39	0.56^*	0.50^*	0.68^*	0.69^*	0.59^*	0.89^*	1.00
10. Pulse 1 size rating, 3.5-second IPI trial	0.44	0.33	0.24	0.70^*	0.53^*	0.35	0.89^*	0.81^*	0.62^*	1.00
11. Pulse 5 size rating, 3.5-second IPI trial	0.37	0.32	0.38	0.36	0.53^*	0.41	0.68^*	0.76^*	0.67^*	0.75^*	1.00
12. Pulse 10 size rating, 3.5-second IPI trial	0.31	0.36	0.52^*	0.11	0.57^*	0.59^*	0.36	0.62^*	0.71^*	0.37	0.79^*	1.00

Notes: The correlations between the size and intensity ratings are indicated with bold.

P<0.05. Older adult group age range: 56–77 years.

Abbreviation: IPI, interpulse interval.