Fig. 1.

Comparison of safety, efficacy, predictability, and satisfaction, among Nd: Yag (1064 nm), Nd: Yag (532 nm), Optical Pump Semiconductor (577 nm) and Crystal Q-switched Nd: Yag (532 nm/3–4 ns) lasers. Scale from 0 to 100 percentage (%). The 532-nm Crystal Q-switched Nd: Yag laser with 3–4 ns pulses showed the best levels in efficacy, which was almost immediate (90%), safety (90%), with minimal secondary effects, and short-, mid-, and long-term high predictability: 90–95.5%. After 5-year follow-up, the global statistical difference between the 1064 nm and 532 nm/3–4 ns laser was p = 0.09172; between 532 and 532 nm/3–4 ns it was p = 0.06377; and between 577 and 532 nm/3–4 ns it was p = 0.10183